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Project Description

crystal is a natural language question answering program. It converts natural text into a semantic representation based on Discourse Representation Theory and performs inferences on the result. Its features include anaphora and presupposition resolution, semantic reasoning through the use of WordNet and VerbNet databases and logical inference. The application currently covers only a small subset of English, but it is sufficiently interesting to mess around.

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Last updated Sat Oct 26 16:59:57 EDT 2019 .