@inproceedings{brunato-etal-2018-sentence,
    title = "Is this Sentence Difficult? Do you Agree?",
    author = "Brunato, Dominique  and
      De Mattei, Lorenzo  and
      Dell{'}Orletta, Felice  and
      Iavarone, Benedetta  and
      Venturi, Giulia",
    editor = "Riloff, Ellen  and
      Chiang, David  and
      Hockenmaier, Julia  and
      Tsujii, Jun{'}ichi",
    booktitle = "Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing",
    month = oct # "-" # nov,
    year = "2018",
    address = "Brussels, Belgium",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/D18-1289/",
    doi = "10.18653/v1/D18-1289",
    pages = "2690--2699"
}