OPT: Oslo–Potsdam–Teesside. Pipelining Rules, Rankers, and Classifier Ensembles for Shallow Discourse Parsing Stephan Oepen author Jonathon Read author Tatjana Scheffler author Uladzimir Sidarenka author Manfred Stede author Erik Velldal author Lilja Øvrelid author 2016-08 text Proceedings of the CoNLL-16 shared task Nianwen Xue editor Association for Computational Linguistics Berlin, Germany conference publication oepen-etal-2016-opt 10.18653/v1/K16-2002 https://aclanthology.org/K16-2002/ 2016-08 20 26