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Our study reveals that the syntactic structure features embedded in a parse tree are very effective for relation extraction and these features can be well captured by the convolution tree kernel .
 feature of: syntactic structure features, parse tree; used for: syntactic structure features, relation extraction; used for: convolution tree kernel, features
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 feature of: syntactic structure features, parse tree; used for: syntactic structure features, relation extraction; used for: convolution tree kernel, features