Before revision: Although Bidirectional Encoder Representations from Transformers (BERT) have achieved tremendous success in many natural language processing (NLP) tasks, it remains a black box , so much previous work has tried to lift the veil of BERT and understand the functionality of each layer .
After revision: Although Bidirectional Encoder Representations from Transformers (BERT) have achieved tremendous success in many natural language processing (NLP) tasks, it remains a black box . A variety of previous works have tried to lift the veil of BERT and understand the functionality of each layer .