Subregular Tree Transductions, Movement, Copies, Traces, and the Ban on Improper Movement Thomas Graf author 2023-06 text Proceedings of the Society for Computation in Linguistics 2023 Tim Hunter editor Brandon Prickett editor Association for Computational Linguistics Amherst, MA conference publication graf-2023-subregular https://aclanthology.org/2023.scil-1.25/ 2023-06 289 299