@inproceedings{targetspecifiedsequencelabelingwithmulti,
  title = {Target-specified Sequence Labeling with Multi-head Self-attention for Target-oriented Opinion Words Extraction},
  author = {Yuhao Feng and Yanghui Rao and Yuyao Tang and Ninghua Wang and He Liu},
  year = {2021},
  booktitle = {NAACL 2021 4},
  url = {https://aclanthology.org/2021.naacl-main.145},
}