A short proof that O_2 is an MCFL Mark-Jan Nederhof author 2016-08 text Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Katrin Erk editor Noah A Smith editor Association for Computational Linguistics Berlin, Germany conference publication nederhof-2016-short 10.18653/v1/P16-1106 https://aclanthology.org/P16-1106/ 2016-08 1117 1126