Two Discourse Tree - Based Approaches to Indexing Answers Boris Galitsky author Dmitry Ilvovsky author 2019-09 text Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2019) Ruslan Mitkov editor Galia Angelova editor INCOMA Ltd. Varna, Bulgaria conference publication galitsky-ilvovsky-2019-two 10.26615/978-954-452-056-4_043 https://aclanthology.org/R19-1043/ 2019-09 367 372