Paper: Resolving Ambiguities of Chinese Conjunctive Structures by Divide-and-conquer Approaches

ACL ID I08-2098
Title Resolving Ambiguities of Chinese Conjunctive Structures by Divide-and-conquer Approaches
Venue International Joint Conference on Natural Language Processing
Session Main Conference
Year 2008
Authors

This paper presents a method to enhance a Chinese parser in parsing conjunctive structures. Long conjunctive structures cause long-distance dependencies and tre- mendous syntactic ambiguities. Pure syn- tactic approaches hardly can determine boundaries of conjunctive phrases properly. In this paper, we propose a divide-and- conquer approach which overcomes the dif- ficulty of data-sparseness of the training data and uses both syntactic symmetry and semantic reasonableness to evaluate am- biguous conjunctive structures. In compar- ing with the performances of the PCFG parser without using the divide-and- conquer approach, the precision of the con- junctive boundary detection is improved from 53.47% to 83.17%, and the bracketing f-score of sentences with conjunctive struc- tures i...