@inproceedings{leveluplearningtoimproveproficiency,
  title = {Level-Up: Learning to Improve Proficiency Level of Essays},
  author = {Wen-Bin Han and Jhih-Jie Chen and Ching-Yu Yang and Jason Chang},
  year = {2019},
  booktitle = {ACL 2019 7},
  url = {https://aclanthology.org/P19-3033},
}