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Fusion of knowledge-based and data-driven approaches to grammar induction

Petrakis Evripidis, Potamianos Alexandros, Cimiano, Philipp 1977-, Walter Sebastian , Iosif Ilias, Unger Christina , Georgiladakis Spyridon

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Περίληψη

Using different sources of information for grammar induction results in grammars that vary in coverage and precision. Fusing such grammars with a strategy that exploits their strengths while minimizing their weaknesses is expected to produce grammars with superior performance. We focus on the fusion of grammarsproduced using a knowledge-based approach using lexicalized ontologies and a data-driven approach using semantic similarity clustering. We propose various algorithms for finding the mapping between the (non-terminal) rules generated by each grammar induction algorithm, followed by rule fusion. Three fusion approaches are investigated: early, mid and late fusion. Results show that late fusion provides the best relative F-measure performance improvement by 20%.

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