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When used as pre-training for action recognition , our method gives significant gains over learning without external data on benchmark datasets like UCF101 and HMDB51 .
 used for: pre-training, action recognition; used for: our method, pre-training; compare: our method, learning without external data; evaluate for: benchmark datasets, our method; evaluate for: benchmark datasets, learning without external data; hyponym of: UCF101, benchmark datasets; conjunction: UCF101, HMDB51; hyponym of: HMDB51, benchmark datasets
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:  pre-training, action recognition; our method, pre-training; our method, learning without external data; benchmark datasets, our method; benchmark datasets, learning without external data; UCF101, benchmark datasets; UCF101, HMDB51; HMDB51, benchmark datasets 
Answer:
 used for: pre-training, action recognition; used for: our method, pre-training; compare: our method, learning without external data; evaluate for: benchmark datasets, our method; evaluate for: benchmark datasets, learning without external data; hyponym of: UCF101, benchmark datasets; conjunction: UCF101, HMDB51; hyponym of: HMDB51, benchmark datasets