4596
An extension to the GPSG grammatical formalism is proposed , allowing non-terminals to consist of finite sequences of category labels , and allowing schematic variables to range over such sequences .
 used for: GPSG grammatical formalism, extension
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  GPSG grammatical formalism, extension 
Answer:
 used for: GPSG grammatical formalism, extension