Department of Computer Science;
Yangzhou University;
Yangzhou 225127;
China;
Key Laboratory of Knowledge Engineering with Big Data(Hefei University of Technology);
Ministry of Education;
Hefei 23009;
China;
Mininglamp Academy of Sciences;
Mininglamp;
Beijing 100089;
China;
text simplification; pre-trained language modeling; BERT; word embeddings;