4597
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 .
 GPSG grammatical formalism, extension
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 GPSG grammatical formalism, extension