4621
Stochastic attention-based models have been shown to improve computational efficiency at test time , but they remain difficult to train because of intractable posterior inference and high variance in the stochastic gradient estimates .
 evaluate for: computational efficiency, Stochastic attention-based models; conjunction: intractable posterior inference, stochastic gradient estimates
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 efficiency, Stochastic attention-based models; intractable posterior inference, stochastic gradient estimates 
Answer:
 evaluate for: computational efficiency, Stochastic attention-based models; conjunction: intractable posterior inference, stochastic gradient estimates