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This paper investigates some computational problems associated with probabilistic translation models that have recently been adopted in the literature on machine translation .
 computational problems, probabilistic translation models; probabilistic translation models, machine translation
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:
 computational problems, probabilistic translation models; probabilistic translation models, machine translation