Cross-lingual RST Discourse Parsing
Table 3: Performance of our monolingual and cross-lingual systems for Span (Sp), Nuclearity (Nuc) and Relation (Rel). ‘‘MFS" corresponds to the baseline system described in Section 6; ‘‘+ emb." is the monolingual system using word embeddings; ‘‘+dev." means that the system is optimized on the development set of the target language (vs the union of the source development sets). For cross-lingual systems, we only report our best results using either word embeddings or bilingual dictionaries.
['System', 'En-DT Sp', 'En-DT Nuc', 'En-DT Rel', 'Pt-DT Sp', 'Pt-DT Nuc', 'Pt-DT Rel', 'Es-DT Sp', 'Es-DT Nuc', 'Es-DT Rel', 'De-DT Sp', 'De-DT Nuc', 'De-DT Rel', 'Nl-DT Sp', 'Nl-DT Nuc', 'Nl-DT Rel', 'Eu-DT Sp', 'Eu-DT Nuc', 'Eu-DT Rel']
Monolingual experiments are aimed at evaluating performance for languages having a large annotated corpus (at least 100 documents). However, the slight drop for Relation shows that we probably miss some lexical information, or that we need to choose a more effective combination scheme than concatenation.