文本数据增强
1)Augmenter WordNet (https://github.com/QData/TextAttack)
2)Augmenter Contextual(https://github.com/makcedward/nlpaug)
3)Paraphrase via back translation (https://github.com/pytorch/fairseq/tree/master/examples/paraphraser)
Augmenter contextual 使用案例: