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ANLP
2000

Unsupervised Discovery of Scenario-Level Patterns for Information Extraction

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Unsupervised Discovery of Scenario-Level Patterns for Information Extraction
Information Extraction (IE) systems are commonly based on pattern matching. Adapting an IE system to a new scenario entails the construction of a new pattern base--a timeconsuming and expensive process. We have implemented a system for finding patterns automatically from un-annotated text. Starting with a small initial set of seed patterns proposed by the user, the system applies an incremental discovery procedure to identify new patterns. We present experiments with evaluations which show that the resulting patterns exhibit high precision and recall.
Roman Yangarber, Ralph Grishman, Pasi Tapanainen
Added 01 Nov 2010
Updated 01 Nov 2010
Type Conference
Year 2000
Where ANLP
Authors Roman Yangarber, Ralph Grishman, Pasi Tapanainen
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