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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 .
 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
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:
 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