XlNet Bert glue data STS-B 数据集 $ head train.tsv index genre filename year old_index source1 source2 sentence1 sentence2 score 0 main-captions MSRvid 2012test 0001 none none A plane is taking off. An air plane is taking off. 5.000 1 main-captions MSRvid 2012test 0004 none none A man is playing a