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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 .
 feature of: computational problems, probabilistic translation models; used for: probabilistic translation models, machine translation
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:  computational problems, probabilistic translation models; probabilistic translation models, machine translation 
Answer:
 feature of: computational problems, probabilistic translation models; used for: probabilistic translation models, machine translation