Beside HILDA, we also compare our results with two baseline parsers on RST-DT: (1) CRF-O, which uses a single unified CRF-based parsing model shown in Figure 8 (the one used for multi-sentential parsing) without distinguishing between intra-and multisentential parsing, and (2) CRF-T, which uses two different CRF-based parsing models for intra-and multi-sentential parsing in the two-stage approach 1S-1S, both models having the same structure as in Figure 8.
cRF-T is a variation of TSP 1-1, where the DcRF-based (chain-structured) intra-sentential parsing model is replaced with a simpler cRF-based parsing model.