An Investigation of Heterogeneity and Overlap in Semantic Roles

摘要

An inventory of semantic roles is needed in semantic role labelling. However, no matter what are semantic roles defined as, there is always heterogeneity and overlap in semantic roles. The semantic properties of members in the same semantic role can be different, while those of members in different semantic roles can be similar. It is a widespread phenomenon in semantic role types. The paper analyzes the cause of heterogeneity and overlap, and points out the close connection between them. The severity of heterogeneity and overlap described in the article is assessed using data from the survey of Chinese PropBank, a publicly available semantic resource consisting of two parts: the Frameset and the corpus.