@inproceedings{riloff-etal-2003-learning,
    title = "Learning subjective nouns using extraction pattern bootstrapping",
    author = "Riloff, Ellen  and
      Wiebe, Janyce  and
      Wilson, Theresa",
    booktitle = "Proceedings of the Seventh Conference on Natural Language Learning at {HLT}-{NAACL} 2003",
    year = "2003",
    url = "https://preview.aclanthology.org/ingest_wac_2008/W03-0404/",
    pages = "25--32"
}