Matching sets of parse trees for answering multi-sentence questions Boris Galitsky author Dmitry Ilvovsky author Sergei O Kuznetsov author Fedor Strok author 2013-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing RANLP 2013 Ruslan Mitkov editor Galia Angelova editor Kalina Bontcheva editor INCOMA Ltd. Shoumen, BULGARIA Hissar, Bulgaria conference publication galitsky-etal-2013-matching https://aclanthology.org/R13-1037/ 2013-09 285 293