INFORMATION EXTRACTION
Goals and Issues of IE
- Analyze text to identify entities, relations or events
- Message Understanding Conference (MUC) parallels Hub
Evaluations for speech recognition
- Named-Entity - names of people, organizations and locations
- Template Element - person - organization relationship in
the document
- Scenario Template - all instances of a particular type of
event
- Coreference - coreferring noun phrases
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Components of an IE System
- Name recognition
- Noun and verb group recognition
- Noun phrase recognition
- Event recognition
- Reference resolution
- Discourse level inference