Cross-Lingual Syntactic Transfer with Limited Resources
Table 11: Accuracy of unlabeled dependencies by POS of the modifier word, for three groups of languages for the universal dependencies experiments in Table 9: G1 (languages with UAS≥80), G2 (languages with 70≤UAS<80), G3 (languages with UAS<70). The rows are sorted by frequency in the G1 languages.
['POS', 'G1 freq%', 'G1 acc.', 'G2 freq%', 'G2 acc.', 'G3 freq%', 'G3 acc.']
We break the results into three groups: G1 languages, where UAS is at least 80% overall; G2 languages, where UAS is between 70% and 80%; and G3 languages, where UAS is less than 70%. There are some quite significant differences in accuracy depending on the POS of the modifier word: for example in the G1 languages ADP, DET, ADJ, PRON and AUX all have over 85% accuracy; in contrast NOUN, VERB, PROPN, ADV all have accuracy that is less than 80%. A very similar pattern is seen for the G2 languages, with ADP, DET, ADJ, and AUX again having greater than 85% accuracy, but NOUN, VERB, PROPN and ADV having lower accuracies. These results suggest that difficulty varies quite signficantly depending on the modifier POS, and different languages show the same patterns of difficulty with respect to modifier POS.