Exploiting Multiple Treebanks for Parsing with Quasi-synchronous Grammars

We present a simple and effective framework for exploiting multiple monolingual treebanks with different annotation guidelines for parsing. Several types of transformation patterns (TP) are designed to capture the systematic annotation inconsistencies among different treebanks. Based on such TPs, we design quasisynchronous grammar features to augment the baseline parsing models. Our approach can significantly advance the state-of-the-art parsing accuracy on two widely used target treebanks (Penn Chinese Treebank 5.1 and 6.0) using the Chinese Dependency Treebank as the source treebank. The improvements are

• Type: Journal
• Year: 2012
• Where: ACL
• Authors: Zhenghua Li, Ting Liu, Wanxiang Che
• Keywords: ACL 2012, Chinese Treebank, Computational Linguistics, Inconsistencies, Target