@inproceedings{hu-etal-2019-open,
    title = "Open-Domain Targeted Sentiment Analysis via Span-Based Extraction and Classification",
    author = "Hu, Minghao  and
      Peng, Yuxing  and
      Huang, Zhen  and
      Li, Dongsheng  and
      Lv, Yiwei",
    editor = "Korhonen, Anna  and
      Traum, David  and
      M{\`a}rquez, Llu{\'i}s",
    booktitle = "Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics",
    month = jul,
    year = "2019",
    address = "Florence, Italy",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P19-1051/",
    doi = "10.18653/v1/P19-1051",
    pages = "537--546"
}