@InProceedings{sugawara-EtAl:2018:EMNLP,
  author    = {Sugawara, Saku  and  Inui, Kentaro  and  Sekine, Satoshi  and  Aizawa, Akiko},
  title     = {What Makes Reading Comprehension Questions Easier?},
  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     = {4208--4219},
  url       = {http://www.aclweb.org/anthology/D18-1453}
}