The Penn Discourse Treebank Eleni Miltsakaki author Rashmi Prasad author Aravind Joshi author Bonnie Webber author 2004-05 text Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04) Maria Teresa Lino editor Maria Francisca Xavier editor Fátima Ferreira editor Rute Costa editor Raquel Silva editor European Language Resources Association (ELRA) Lisbon, Portugal conference publication miltsakaki-etal-2004-penn https://aclanthology.org/L04-1386/ 2004-05