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This paper presents a new approach to statistical sentence generation in which alternative phrases are represented as packed sets of trees , or forests , and then ranked statistically to choose the best one .
 approach, statistical sentence generation
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:
 approach, statistical sentence generation