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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 .
 time-synchronous graph-search strategy, recognizer; bigram back-off language models, recognizer; bigram back-off language models, time-synchronous graph-search strategy
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:
 time-synchronous graph-search strategy, recognizer; bigram back-off language models, recognizer; bigram back-off language models, time-synchronous graph-search strategy