Oh, Jong-Hoon, Kentaro Torisawa, Chikara Hashimoto, Ryu Iida, Masahiro Tanaka, and Julien Kloetzer. “A Semi-Supervised Learning Approach to Why-Question Answering”. Proceedings of the AAAI Conference on Artificial Intelligence 30, no. 1 (March 5, 2016). Accessed May 25, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/10388.