AAAI Publications, Thirty-Second AAAI Conference on Artificial Intelligence

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Jointly Parse and Fragment Ungrammatical Sentences
Homa B. Hashemi, Rebecca Hwa

Last modified: 2018-04-27

Abstract


This paper is about detecting incorrect arcs in a dependency parse for sentences that contain grammar mistakes. Pruning these arcs results in well-formed parse fragments that can still be useful for downstream applications. We propose two automatic methods that jointly parse the ungrammatical sentence and prune the incorrect arcs: a parser retrained on a parallel corpus of ungrammatical sentences with their corrections, and a sequence-to-sequence method. Experimental results show that the proposed strategies are promising for detecting incorrect syntactic dependencies as well as incorrect semantic dependencies.

Keywords


Parse Tree Fragmentation;Dependency Arc Pruning;Ungrammatical Sentences;Semantic Role Labeling

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