1627
A model is presented to characterize the class of languages obtained by adding reduplication to context-free languages .
 used for: model, class of languages; used for: reduplication, context-free languages
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: model, class of languages; used for: reduplication, context-free languages