Shimizu, Nobuyuki, Atsuyuki Morishima, and Ryota Hayashi. “A Crowdsourcing Method for Obtaining Rephrased Questions”. Proceedings of the AAAI Conference on Human Computation and Crowdsourcing 3, no. 1 (September 23, 2015): 32-33. Accessed May 14, 2024. https://ojs.aaai.org/index.php/HCOMP/article/view/13251.