An improved parser for data-oriented lexical-functional analysis

Details An improved parser for data-oriented lexical-functional analysis An improved parser for data-oriented lexical-functional analysis

2000-09-27

arxiv.org/abs/cs/0009026v1

Proceedings ACL'2000, Hong Kong

Computer Science

Computation and Language

8 pages

Scientific paper

We present an LFG-DOP parser which uses fragments from LFG-annotated sentences to parse new sentences. Experiments with the Verbmobil and Homecentre corpora show that (1) Viterbi n best search performs about 100 times faster than Monte Carlo search while both achieve the same accuracy; (2) the DOP hypothesis which states that parse accuracy increases with increasing fragment size is confirmed for LFG-DOP; (3) LFG-DOP's relative frequency estimator performs worse than a discounted frequency estimator; and (4) LFG-DOP significantly outperforms Tree-DOP is evaluated on tree structures only.

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