93
We show that various features based on the structure of email-threads can be used to improve upon lexical similarity of discourse segments for question-answer pairing .
 used for: features, lexical similarity; used for: features, question-answer pairing; used for: structure of email-threads, features; feature of: lexical similarity, discourse segments
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:
 used for: features, lexical similarity; used for: features, question-answer pairing; used for: structure of email-threads, features; feature of: lexical similarity, discourse segments