@InProceedings{brunato-EtAl:2018:EMNLP,
  author    = {Brunato, Dominique  and  De Mattei, Lorenzo  and  Dell'Orletta, Felice  and  Iavarone, Benedetta  and  Venturi, Giulia},
  title     = {Is this Sentence Difficult? Do you Agree?},
  booktitle = {Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing},
  month     = {October-November},
  year      = {2018},
  address   = {Brussels, Belgium},
  publisher = {Association for Computational Linguistics},
  pages     = {2690--2699},
  url       = {http://www.aclweb.org/anthology/D18-1289}
}