An empirical study for Vietnamese dependency parsing To appear in Proceedings of the Australasian Language Technology Association Workshop 2016.
Table 3: LAS by most frequent dependency labels. “Avg.” denotes the averaged score of four parsers.
['Type', 'BistG', 'BistT', 'MST', 'Malt', 'Avg.']
The labels with higher than 90% accuracy are adv, det and pob in which surprisingly MST obtains the best results on all these labels and even on both conj and dob labels. BistT obtains the best scores on the two most frequent labels nmod and vmod, and also on the loc label. BistG performs best on the remaining labels. Biggest ranges (>10%) of obtained scores across parsers associate to labels coord, dep, sub and tmp. Those with LAS scores ranging from 50% to about 60% are coord, loc, tmp and vmod in which coord, loc and tmp are among the least frequent labels, while vmod is the second most frequent label.