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The recognizer uses a time-synchronous graph-search strategy which is shown to still be viable with a 20k-word vocabulary when used with bigram back-off language models .
 used for: time-synchronous graph-search strategy, recognizer; used for: bigram back-off language models, recognizer; conjunction: bigram back-off language models, time-synchronous graph-search strategy
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:  time-synchronous graph-search strategy, recognizer; bigram back-off language models, recognizer; bigram back-off language models, time-synchronous graph-search strategy 
Answer:
 used for: time-synchronous graph-search strategy, recognizer; used for: bigram back-off language models, recognizer; conjunction: bigram back-off language models, time-synchronous graph-search strategy