4232
In this paper , we propose a novel Cooperative Model for natural language understanding in a dialogue system .
 used for: Cooperative Model, natural language understanding; used for: natural language understanding, dialogue system
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: Cooperative Model, natural language understanding; used for: natural language understanding, dialogue system