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Biomedical Event Extraction without Training Data

, , , and . Proceedings of the BioNLP 2009 Workshop Companion Volume for Shared Task, page 37--40. Boulder, Colorado, Association for Computational Linguistics, (June 2009)

Description

BioNLP'09 event extraction system intended to be largely domain-independent. Mid-range result in shared task. Dictionary of trigger-event type mappings. Matching is performed first by lemma, then stem, then partial-match, initially overgenerating. Pipeline: POS; replace NE phrases with NPPs; get 10 best parses with unlexicalised RASP parser; derive a set of GRs weighted according to their support among parses; match to set of 5 GR paths identified from development data, backing off from a lexicalised to an unlexicalised model (with variants for Regulation and Binding events). Basic anaphora resolution. Generate an event for each trigger-arg pair, except regulation.

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