Weak Semi-Markov CRFs for Noun Phrase Chunking in Informal Text Aldrian Obaja Muis author Wei Lu author 2016-06 text Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Kevin Knight editor Ani Nenkova editor Owen Rambow editor Association for Computational Linguistics San Diego, California conference publication muis-lu-2016-weak 10.18653/v1/N16-1085 https://aclanthology.org/N16-1085/ 2016-06 714 719