When building search or other word-matching systems a common approach to is to use synonym lists to expand the words you're looking for.
However, since words can be used in different senses, using a dictionary or a resource like WordNet results in too many false positives. The word "charged" includes synonyms such as "accuse", "bill" and "assault", most of which are only valid in certain contexts.
TextRazor offers a Contextual Entailment/Synonym extractor. For each word or phrase in the text we algorithmically identify a list of potential entailments (words "implied" by your content), by taking into account the source word's meaning. When matching your text we use the context each word comes with to determine how confident we are in a specific entailment being valid in a given context.
Entailment extraction can be used to build powerful semantic search applications, or to help make your pattern extraction rules more robust to different expressions of the same underlying meaning.
Contextual entailment extraction is currently only available in English.
To retrieve entailments from your text simply add the "entailment" extractor to your request.
Read more in our Python Client or REST Documentation.
You can try out the Entailment Extraction system with your own documents through our Online Demo.
