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Robust German Noun Chunking With a Probabilistic Context-Free Grammar

9 years 11 months ago
Robust German Noun Chunking With a Probabilistic Context-Free Grammar
We present a noun chunker for German which is based on a head-lexicalised probabilistic contextfl'ee grammar. A manually developed grammar was semi-automatically extended with robustness rules in order to allow parsing of unrestricted text. Tile model parmncters were learned from unlabellcd training data by a probabilistic context-fl'ee parser. For extracting noun chunks, the parser generates all possible noun chunk analyses, scores them with a novel algorithm which maximizes tile best chunk sequence criterion, and chooscs the most probable chunk sequence. An evaluation of the chunker on 2,140 hand-annotated noun chunks yielded 92% recall and 93% precision.
Helmut Schmid, Sabine Schulte im Walde
Added 01 Nov 2010
Updated 01 Nov 2010
Type Conference
Year 2000
Where COLING
Authors Helmut Schmid, Sabine Schulte im Walde
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