Is it recommended to train a NER model using a dataset that has all tokens annotated?

I'd like to train a model to predict the constant and variable parts in log messages. For example, considering the log message: Example log 1, the trained model would be able to identify: 1 as the variable Example, log labeled as the constants. To train the model, I'm thinking of leveraging a training dataset that would have all tokens in all of the log entries annotated. For example, for a particular log entry in the dataset, we would have a …
Category: Data Science

Entity recognition with context/relation

Is there a way to get a specific entity based on the context where it is found? For example: The temperature today is 35°C. Store risperidone tablet at 20°C. Both are talking about temperature. For the first sentence, I would want the temperature to be a "WeatherTemperature" entity. In the second sentence, I would want the temperature to be "DrugTemperature". What model could I use to train for this behavior?
Category: Data Science

How to extract and classify data from a column in excel?

I have a column in an Excel sheet that contains a lot of data separated by || delimiters. The data can be classified to some classes like Entity, IFSC codes, transaction reference id, etc. A single cell looks like this: EFT INCOMING||0141201||NHFI0141201||UTR||SBIN118121948660 M S||some-name ||some-purpose||TRN REF NO:a1b2c3d4e5 Not every cell has the same number of classes or even the same type of classes. Another example: COMM/CHARGES/FEES||CHECK/REF.6546644473||BILPAY CCTY BEARING C||00.00||00012||18031358||BLPY||TRN REF NO:a1b2c3d4e5 I tried extracting this information using regular expressions and …
Category: Data Science

Entity Embeddings of email address

I have a set of email address e.g. [email protected], [email protected], [email protected], [email protected]..... Is it possible to apply ML/Mathematics to generate category (like NER) from Id (part before @). Problem with straight forward application of NER is that the emails are not proper english. [email protected] > Person [email protected] > Person [email protected] > Company [email protected] > Company [email protected] > Place/Company
Category: Data Science

How to train NER LSTM on single sentence level

My documents are only a single sentence long, containing one annotation. Sentences with the same named entity of course are similar, but not context-wise. NER training examples (afaik) always has documents sequentially related, aka the next document is context-wise related to the previous document. Consider the example below. The first sentence is about the US, with location annotations. The second sentence is about an organisation but still related to the previous. The United States of America (LOC), commonly known as …
Category: Data Science

How to train a machine learning model for named entity recognition

I cannot find any sources about the architectures of machine learning models to solve for NER problems. I vaguely knows it is a multiclass classification problem, but how can we format our input to feed into such multiclass classifier? I know the inputs must be annotated corpus, but how can we feed that chunk of pairs of (word, entity label) into the classifier? Or, how do you feature-engineer such corpus to feed into ML models? Or, in general, how can …
Category: Data Science

Tagging short strings based on position, case, word frequency and so on

Most of the NLP stuff I've been looking at does NER given a long blob of text (e.g., a news article). I am curious what the best method is when you have millions of short strings, say for example names: Mr. Foo Bar John Doe, MBA, PhD Say I want to create a model that recognizes the position of the word MBA, the fact that it is surrounded by commas, and so on, and tags based on that. Is NLP …
Category: Data Science

reducing false positives with annotated named entity recognition model

I am training a NER model to detect mentioned phrases and slang words in a bias study conducted on court cases. Essentially, I have packets of text that I scanned and these are the complete proceedings. The model is great at detecting the phrases I want based on annotations that I have created from the many cases that I have already scanned. However, I am facing false positives for certain phrases. Here is an example of a phrase I want …
Category: Data Science

Comparing Multiclass classifiers with "No Answer"-Class

I have three classifiers to classify some words into four classes. Every word that does not fit into any of these four classes gets classified as "No Answer". I would like to compare the classifiers with Precision, Recall, and F1-Score. Do I have to ignore the "No Answer" class to calculate the average Precision and so on or is it important to include it?
Category: Data Science

Best Approach for this Entity Extraction Problem?

Context I have looked endlessly for a similar question to this but I haven't found one so hopefully someone can offer me some insight. I have a task where I'm given a bunch of employees with their alphanumeric ID number. So my inputs and labels look like such (this is idealized, the existing entries need a TON of cleaning, but this is how it would look after cleaning): The Task: I need to extract the ID number from the Full …
Category: Data Science

Information Extraction/Semantic Search for long, unstructured documents

I am stuck with a particular task of information extraction. I have a few hundred, long (5-35 pages) pdf, doc and docx project documents from which I seek to extract specific information and store them in a structured database. The ultimate goal is to extract and store information in a way that we can query those and any new incoming documents for fast and reliable information. For instance, I want to query a combination of entities from the knowledge base …
Category: Data Science

How to use is_split_into_words with Huggingface NER pipeline

I am using Huggingface transformers for NER, following this excellent guide: https://huggingface.co/blog/how-to-train. My incoming text has already been split into words. When tokenizing during training/fine-tuning I can use tokenizer(text,is_split_into_words=True) to tokenize the incoming text. However, I can't figure out how to do the same in a pipeline for predictions. For example, the following works (but requires incoming text to be a string): s1 = "Here is a sentence" p1 = pipeline("ner",model=model,tokenizer=tokenizer) p1(s1) But the following raises the following error: Exception: …
Category: Data Science

How to classify named entities of the same type?

I am doing a project where I am extracting date/time entities from text. I'm using a rule-based system to extract the temporal expressions and ground them to an actual date/time. The second part of the problem I hope to solve is label the role of each entity discovered. For example, consider the following text: "Leaving at 2pm and back at 4pm". I correctly identified 2pm and 4pm as date/time entities. However, I'm unable to say whether the entity is "start-time", …
Category: Data Science

Calculating confidence score in NER

I am working on a problem on Named Entity Recognition. Given a text, my model is detecting the Named Entities and extracting that info for the end-user. Now the ask is end-user needs a confidence score along with the extracted entity. For example, the given text is: XYZ Bank India Limited is a good place to invest your money - Our model is detecting XYZ Bank as an Org, but India as a Location (which is wrong - the whole …
Category: Data Science

How to do NER predictions with Huggingface BERT transformer

I am trying to do a prediction on a test data set without any labels for an NER problem. Here is some background. I am doing named entity recognition using tensorflow and Keras. I am using huggingface transformers. I have two datasets. A train dataset and a test dataset. The training set has labels, the tests does not. Below you will see what a tokenized sentence looks like, what it's labels look like, and what it looks like after encoding …
Category: Data Science

Named Entity Recognition with BIO Tagging

I'm trying to implement NER using BIO annotation. For example "I went to the United States" [O, O, O, B, I, I] where B and I denote the beginning and 'I' the following of the entity. However, when I use a vanilla BERT to do classification(whether it belongs it 'B', 'I', 'O') at each position of the sequence, I encounter cases where 'O' is followed by an 'I'. There are no cases in the data that exhibit ('O', 'I') pattern …
Category: Data Science

Is NLP suitable for my legal contract parsing problem?

My company has a product that involves the extraction of a variety of fields from legal contract PDFs. The current approach is very time consuming and messy, and I am exploring if NLP is a suitable alternative. The PDFs that need to be parsed usually follow one of a number of "templates". Within a template, almost all of the documents are the same, except for 20 or so specific fields we are trying to extract. That being said, there are …
Category: Data Science

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