Parser-based retraining for domain adaptation of probabilistic generators
Hogan, Deirdre and Foster, Jennifer and Wagner, Joachim and van Genabith, Josef (2008) Parser-based retraining for domain adaptation of probabilistic generators. In: INLG 08 - 5th International Natural Language Generation Conference , 12-14 June 2008, Salt Fork, Ohio, USA.
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While the effect of domain variation on Penn-treebank-
trained probabilistic parsers has been investigated in previous work, we study its effect on a Penn-Treebank-trained probabilistic generator. We show that applying the generator to data from the British National Corpus
results in a performance drop (from a BLEU score of 0.66 on the standard WSJ test set to a BLEU score of 0.54 on our BNC test set). We develop a generator retraining method where the domain-specific training data is automatically
produced using state-of-the-art parser output. The retraining method recovers a substantial portion of the performance drop, resulting in a generator which achieves a BLEU score of 0.61 on our BNC test data.
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