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Questions tagged [named-entity-recognition]

The tag has no usage guidance.

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1answer
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Grouping domain specific words/phrases with same meaning

I am looking at NLP methods to group together words/phrases which could have the same meaning. For example, in the sentence 'the table is broken' broken could be replaced by the following words/...
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1answer
45 views

What is NLP technique to generalize manually created rules in text?

Let's say we have a free text containing key-value entities. Example: "... patient's tumour has width 6 cm and height 5 cm" Then an expert comes, marks it as important, thus we do have the rule for ...
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15 views

Named entity co occurrences in sentences

I am researching about entity relations mined from articles. I am going to use the relations to form a social network that describes the relations between politicians in the news (strong relationships,...
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15 views

Using an ontology to recognize named entities in free text

I'm trying to solve a fairly basic problem in NPL efficiently. What tool or software package would you use to identify the words, or group of words that are part of an given ontology within a free ...
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22 views

How to do good Keyword Extraction

I tried the sketch engine (no ad!) and I wonder what might be the underlying algorithms to do such a good keyword extraction. I have a document consitsing of rows of sentences and from each I want the ...
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1answer
131 views

Difference between IOB and IOB2 format?

I have to tag a dataset for NER. I came across conll2002/esp. What I understand so far, in IOB2 format if I want to tag '...
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1answer
50 views

Extracting specific data from unstructured text - NER

I have a reasonably simple problem to solve. I need to extract reservations numbers from unstructured text. Based on my research, it seems to be an NER problem. Based on a visual analysis of the ...
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24 views

How does Stanford CRF encode NER string features?

Most features created by the NERFeatureFactory are strings e.g. from usePrev, useNext, ...
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33 views

concat second input has no effect? (PoS in NER, keras)

Input of my NER-model are word embeddings of word sequences. Almost all entities are nouns and most of the nouns are entities, so I think adding Part of Speech tags should improve the predictions. ...
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1answer
21 views

how to encode labels for relationship extraction

I am trying to extract relationship from text. So, lets take the following text "He went to movie. but, they went to school" So, here the relationship's are "He and Movie", "they and school". How ...
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7 views

How do I add ground truth in FEBRL

I'm using FEBRL to do some entity resolution, but I can't figure out a way to add the ground truth to the program in order to evaluate the results. Can someone with experience on this program help ...
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1answer
46 views

Improve NER label results on Non-English text

I am working on some Medieval Latin text and was using various methods of NER such as CLTK (Latin Model), Spacy (Multilingual, Italian, Spanish Model) and StanfordNER (Spanish Model). When I used the ...
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how to deal with varying output layer

i am trying to do Named Entity Recognition. So, for input, i am using entire text(converted to word level embedding as input) and out put as same length as input, but only the required entity will be ...
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Keras: calculate sample_weight? -> accuracy plot wild ups/downs?

I'm on a sequence labeling problem where each word of a sentence should be classified into one of 3 classes (which are one-hot encoded). No generator used. However, one of the 3 classes is naturally ...
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46 views

Algorithms for Sentiment Analysis on Entity

I want to make sentiment analysis for an entity which was found, like Google NLP. Entity should have magnitude and score. Please share with me the possible research papers. p/s please not propose ...
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1answer
37 views

Is it a red flag that increasing the number of parameters makes the model less able to overfit small amounts of data?

I'm training a deep network (CNN-LSTM-CRF) for Named Entity Recognition. Is there a reason that increasing the number of parameters would make the network less able to overfit a small training set (~...
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2answers
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Is there any named entity reconginition algorithm trained for the french language?

I am trying to implement a utility for my mobile application to perform some actions based on user questions. I need an algorithm to extract named entities from a text string (French grammar). I have ...
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1answer
916 views

Text extraction from documents using NLP or Deep Learning

I am looking for references(Papers/github projects) on how to use deep learning in a text extraction task. Recently I was given a task to extract important information from documents of similar type, ...
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82 views

Case-Sensitive Word Embeddings for French

Are there any pre-trained case-sensitive word embeddings for French? The only word embeddings for French I have found is FastText and it is not case sensitive. I am currently working on problems ...
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Extract keywords from text misses some entities [closed]

I have tried a few of the keyword extraction techniques and they work fine. But when I uploaded documents from scientific domains such as medical, genetics, healthcare, many medical or rather ...
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2answers
280 views

How many examples needed for named entity disambiguation?

If I want to build a named entity linking system for resumes using an ontology of occupations and skills about how many annotations would I need? The ontology has about 20,000 entities. As a lower ...
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45 views

How to filter Named Entity Recognition results

I have a pipeline built which at the end outputs a bunch (thousands to tens of thousands or more) of named entities. I'd like to do aggregates on those named entities (to see, e.g. how many times a ...
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34 views

NER at sentence level or document level?

Should NER models (LSTM or CRF) take input training data at sentence level or paragraph level? Let's say we have this input text, and we would like to do Named Entity Extraction: GOP Sen. Rand ...
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439 views

How to extract a relation from a Named entity recognition model using NLTK in python

Using this sample article I have created a NLTK model which is able to perform named entity recognition - ...
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1answer
314 views

How to extract entities from text using existing ontologies?

I am working on a entity extraction task and I am using Stanford CoreNLP NER. Here, I want to detect entities of type "Animal", "Building", "Imagery", etc., which are not covered in Stanford CoreNLP ...
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25 views

Are there any measures for Entity Ambiguity?

When using/building a system for Entity Linking, is there a well-known measure for "ambiguity degree" of an entity? Some approach to compare named entities regarding how difficult to disambiguate?
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1answer
374 views

Why are Chunking and IOB tags necessary?

I've just come across chunking and I can't get my head around why is it necessary? I know that it is used for 'named entity recognition'. I have few questions: Why and how is Chunking helpful? Plus ...
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How does Api.ai Google dialogueflow classifies “intent” and extracts data from slots

I am trying to build a very naive version of Api.ai, now Google DailogueFlow. I wanted to know two things. How DF classifies sentences with entities in it that can be user created and/or things like ...
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2answers
116 views

What is the tag mapping for entity recognition in nltk?

When doing entity recognition using NLTK, one gets as a result a Tree with a bunch of words mapped to tags (eg. Mark -> NNP, <...
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1answer
142 views

How to extract specific information from raw , unstructured text using NLP and Deep Learning?

I have data coming from different sources having similar information like the below example where different sources want to specify the age criteria. Is there a NLP or Deep learning based approach ...
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2answers
2k views

StanfordTokenizer will be deprecated in version 3.2.5 Warning

I was testing the StanfordNERTagger using the NLTK wrapper and this warning appeared: ...
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333 views

Extracting place/organization name from card transaction SMS

From the credit/debit card transaction SMS (example below), I want to extract the place/organization name where the money was spent. Sample SMS Thank you for using your SBI Debit Card 607XX8310 ...
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0answers
455 views

Extract numeric values from text snippets using machine learning

I have text snippets where I want to extract a numeric value. Is there a way to train a model for such a use case (using python): Here is how my data look like (I have about 1000 samples): "| 3 ...
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1answer
514 views

Dictionary based statistical NER learner

If I have to paraphrase the current NER methodologies, it generally finds patterns in strings and creates its own "vocabulary", so to speak. Naturally, it would perform like a charm with a mammoth ...
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1answer
2k views

How does MITIE perform named entity recognition?

I'm trying to use MITIE to extract named entities from short text. I'm interested in entities such as dates, times, names, and locations. Out of the box, MITIE only recognises names, locations, and ...
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1answer
210 views

Determine document novelty/similarity with the aid of Latent Dirichlet allocation (LDA) or Named Entities

Given an index or database with a lot of (short) documents (~ 1 million), I am trying to do some kind of novelty detection for each newly incoming document. I know that I have to compute the ...
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1answer
2k views

Stanford parser Python : Combine NER and POS tags

Hi I am experimenting with stanford parser and NER with python Input = "Rami Eid is studying at Stony Brook University in NY" Parser Output: NER Output : <...
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1answer
539 views

ML algorithm for determining CSV file header names based on content

I have a large amount of CSV files, an example of which (for job titles) is listed below. The data is noisy (there are misspellings, difference in capitalisation, missing values, and they are not well-...
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1answer
1k views

Named entity recognition (NER) features

I'm new to Named Entity Recognition and I'm having some trouble understanding what/how features are used for this task. Some papers I've read so far mention features used, but don't really explain ...
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1answer
220 views

Stanford NER is not properly extracting percentages

I'm trying to extract percentages using Stanford NER. But it is not extracting percentage properly. ...
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1answer
568 views

extract names in a list of names

I have been provided with a text cleaning task and I am assuming this involves some amount of natural language processing. I have a collection of names which does not have any specific pattern and ...
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2answers
486 views

does entity recognition comes under classification problem?

I want to extract named entities from a text but I don't know whether that comes under classification or not.if it comes under classification then how to prepare classes for recognizing entities in a ...
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2answers
2k views

What algorithm to use for extracting information from bank statements

I am trying to find the best way to extract information from bank statements. A bank transaction is not a natural text but still human readable. I would like to extract a bunch of data if present ...
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1answer
968 views

Information extraction with reinforcement learning, feasible?

I was wondering if one could use Reinforcement Learning (as it is going to be more and more trendy with the Google DeepMind & AlphaGo's stuff) to parse and extract information from text. For ...
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1answer
2k views

What algorithm to use for a specific 'Named Entity Recognition'/'Information extraction' problem

I am trying to write a model that will extract certain details from financial documents. It must be able to extract the; contract start date, contract duration, contract value and all named entities. ...
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1answer
2k views

Algorithm for classification of words into given categories [closed]

I'm working with textual data from medical field. I have a list of words and I want to build an algorithm that can classify each word into one or more given categories, like Medicine_Name ...
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0answers
170 views

NLP : What are some common verbs surrounding organization names in text

I am trying to come up with some rules to detect named entities, specifically company or organization names in text. I think it makes sense to focus on verbs. There are a lot of ...
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2answers
7k views

NLP : Is Gazetteer a cheat

In NLP there is a concept of Gazetteer which can be quite useful for creating annotations. As far as i understand, ...
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1answer
72 views

Algorithm to construct similarity structure from hash lookup table

I have constructed a lookup table using locality-sensitive hashing for comparing nearly similar documents/records. If two records (columns) have the same hash value in a row, they are considered to be ...
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1answer
308 views

Recognizing numerical entities

I'm trying to perform classification on a large dataset with mixed numerical and categorical features. The dataset is all semi-structured text, so everything is a String. Does anyone know of a library ...