Abstract：To deal with the defiency in employing sentence information of probabilistic context free grammar (PCFG) on parsing, subsidiary context and lexical information are introduced to propose two structure disambiguation methods based on PCFG. Both the accuracy and comprehensiveness are elevated at the cost of efficiency through the proposed layered parsing strategy. The experimental results show that the model of Chinese syntactic parsing based on subsidiary context and lexical information using more sentence information do better at disambiguation compared to PCFG. Key wordsChinese syntactic parsing; probabilistic context free grammar; subsidiary context; lexical information; layered parsing
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