Varieties of Plain Language Allen Riddell author Yohei Igarashi author 2021-09 text Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2021) Ruslan Mitkov editor Galia Angelova editor INCOMA Ltd. Held Online conference publication riddell-igarashi-2021-varieties https://aclanthology.org/2021.ranlp-1.133/ 2021-09 1180 1187