Declarative information extraction using datalog with embedded extraction predicates
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
SystemT: a system for declarative information extraction
ACM SIGMOD Record
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
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Part of what makes event extraction difficult is the lack of a clear definition of the event concept. We argue that a good definition would be a positive contribution to Information Extraction and its applications. We give a preliminary discussion of a logical definition to stimulate discussion.