3943
These two extensions work in cooperation to deal with the intolerable computational cost of BP caused by the huge number of existing labels .
 used for: extensions, intolerable computational cost of BP
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:  extensions, intolerable computational cost of BP 
Answer:
 used for: extensions, intolerable computational cost of BP