Synthetic QA Corpora Generation with Roundtrip Consistency Chris Alberti author Daniel Andor author Emily Pitler author Jacob Devlin author Michael Collins author 2019-07 text Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics Anna Korhonen editor David Traum editor Lluís Màrquez editor Association for Computational Linguistics Florence, Italy conference publication alberti-etal-2019-synthetic 10.18653/v1/P19-1620 https://aclanthology.org/P19-1620/ 2019-07 6168 6173