The Penn Discourse TreeBank 2.0. Rashmi Prasad author Nikhil Dinesh author Alan Lee author Eleni Miltsakaki author Livio Robaldo author Aravind Joshi author Bonnie Webber author 2008-05 text Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC’08) Nicoletta Calzolari editor Khalid Choukri editor Bente Maegaard editor Joseph Mariani editor Jan Odijk editor Stelios Piperidis editor Daniel Tapias editor European Language Resources Association (ELRA) Marrakech, Morocco conference publication prasad-etal-2008-penn https://aclanthology.org/L08-1093/ 2008-05