Researchers who, instead, tried to build the end-to-end parsing pipelines considered a wider range of approaches including sequence models and RNNs (Biran and McKeown, 2015;Feng and Hirst, 2014;Ji and Eisenstein, 2014;Li et al., 2014).
when they tried to utilize the discourse structures for out-domain applications, they used RNNbased models and found that those models are advantageous for their downstream tasks (Bhatia et al., 2015;Ji and Smith, 2017).