text: Ruize Wang, Duyu Tang, Nan Duan, Zhongyu 
  Wei, Xuanjing Huang, Jianshu ji, Guihong Cao, 
  Daxin Jiang, and Ming Zhou. 2020a. K-Adapter: 
  Infusing Knowledge into Pre-Trained Models 
  with Adapters. arXiv:2002.01808 [cs]. 
  
  David Vilares, Michalina Strzyz, Anders Søgaard, 
  and Carlos Gómez-Rodríguez. 2020. Parsing as 
  pretraining. In Thirty-Fourth AAAI Conference 
  on Artiﬁcial Intelligence (AAAI-20).  Wei Wang, Bin Bi, Ming Yan, Chen Wu, Zuyi 
  Bao, Liwei Peng, and Luo Si. 2019a. Struct- 
  BERT: Incorporating Language Structures into 