6982
These models can be viewed as pairs of probabilistic context-free grammars working in a ` synchronous ' way .
 feature of: probabilistic context-free grammars, models
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:  probabilistic context-free grammars, models 
Answer:
 feature of: probabilistic context-free grammars, models