Multi-Phase Context Vectors for Generating Feedback for Natural-Language Based Programming Michael Hsiao author 2021-09 text Proceedings of the Seventh International Workshop on Controlled Natural Language (CNL 2020/21) Tobias Kuhn editor Silvie Spreeuwenberg editor Stijn Hoppenbrouwers editor Norbert E Fuchs editor Special Interest Group on Controlled Natural Language Amsterdam, Netherlands conference publication hsiao-2021-multi https://aclanthology.org/2021.cnl-1.16/ 2021-09