@inproceedings{lloret-etal-2009-towards,
    title = "Towards Building a Competitive Opinion Summarization System: {C}hallenges and Keys",
    author = "Lloret, Elena  and
      Balahur, Alexandra  and
      Palomar, Manuel  and
      Montoyo, Andr{\'e}s",
    editor = "Germann, Ulrich  and
      Shah, Chirag  and
      Stoyanchev, Svetlana  and
      Ros{\'e}, Carolyn Penstein  and
      Sarkar, Anoop",
    booktitle = "Proceedings of Human Language Technologies: The 2009 Annual Conference of the North {A}merican Chapter of the Association for Computational Linguistics, Companion Volume: Student Research Workshop and Doctoral Consortium",
    month = jun,
    year = "2009",
    address = "Boulder, Colorado",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest_wac_2008/N09-3013/",
    pages = "72--77"
}