Lots of valuable textual information is used to extract relations between named entities from literature. The composite kernel approach is proposed in this paper. The composite kernel approach calculates similarities based on the following information: (1) Phrase structure in convolution parse tree kernel that has shown encouraging results. (2) Predicateargument structure patterns. In other words, the approach deals with syntactic structure as well as semantic structure using a reciprocal method. The proposed approach was evaluated using various types of test collections, and it showed the better performance compared with those of previous approach, using only information from syntactic structures. In addition, it showed a better performance than those of the state of the art approach.
Composite Kernel; Relation extraction; Tree Kernel; Predicate-Argument structure pattern
Information : an international interdisciplinary journal