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In particular , we explore the use of probabilistic decision tree within the clustering framework to account for the variation as well as regularity in human created summaries .
 feature of: clustering framework, probabilistic decision tree
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:  clustering framework, probabilistic decision tree 
Answer:
 feature of: clustering framework, probabilistic decision tree