Most recent works on RST discourse parsing focuses on the task of tree building, relying on a gold discourse segmentation (Ji and Eisenstein, 2014;Feng and Hirst, 2014;Li et al., 2014;Joty et al., 2013).
discourse parsers' performance drops by 12-14% when relying on predicted segmentation (Joty et al., 2015), underscoring the importance of discourse segmentation.