An empirical study for Vietnamese dependency parsing To appear in Proceedings of the Australasian Language Technology Association Workshop 2016.
Table 5: Upper bound of ensemble performance.
['[BOLD] Oracle', '[BOLD] With punct. LAS', '[BOLD] With punct. UAS', '[BOLD] With punct. LS', '[BOLD] Without punct. LAS', '[BOLD] Without punct. UAS', '[BOLD] Without punct. LS']
One simple approach to improve parsing performance for Vietnamese is to separately use the graph-based parser BistG for short sentences and the transition-based parser BistT for longer sentences. dependable assumes that either the best tree or the best arc can be determined by an oracle.