1. Agarwal, M., Mannem, P.: Automatic gap-fill question generation from text books. In: Proceedings of the 6th Workshop on Innovative Use of NLP for Building Educational Applications, IUNLPBEA 2011, pp. 56–64. Association for Computational Linguistics, USA (2011)
2. Angeli, G., Premkumar, M.J.J., Manning, C.D.: Leveraging linguistic structure for open domain information extraction. In: Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers), pp. 344–354 (2015)
3. Banko, M., Cafarella, M.J., Soderland, S., Broadhead, M., Etzioni, O.: Open information extraction from the web. IJCAI 7, 2670–2676 (2007)
4. Conejo, R., Guzmán, E., Trella, M.: The SIETTE automatic assessment environment. Int. J. Artif. Intell. Educ. 26, 270–292 (2015)
5. Danon, G., Last, M.: A syntactic approach to domain-specific automatic question generation. CoRR (2017)