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We examine the relationship between the two grammatical formalisms : Tree Adjoining Grammars and Head Grammars .
 hyponym of: Tree Adjoining Grammars, grammatical formalisms; compare: Tree Adjoining Grammars, Head Grammars; hyponym of: Head Grammars, grammatical formalisms
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:
 hyponym of: Tree Adjoining Grammars, grammatical formalisms; compare: Tree Adjoining Grammars, Head Grammars; hyponym of: Head Grammars, grammatical formalisms