Strong Learning of some Probabilistic Multiple Context-Free Grammars Alexander Clark author 2021-12 text Proceedings of the 17th Meeting on the Mathematics of Language Henrik Björklund editor Frank Drewes editor Association for Computational Linguistics Umeå, Sweden conference publication clark-2021-strong-learning https://aclanthology.org/2021.mol-1.3/ 2021-12 23 37