Feature-Rich Part-of-speech Tagging for Morphologically Complex\n Languages: Application to Bulgarian

We present experiments with part-of-speech tagging for Bulgarian, a Slavic\nlanguage with rich inflectional and derivational morphology. Unlike most\nprevious work, which has used a small number of grammatical categories, we work\nwith 680 morpho-syntactic tags. We combine a large morphological lexicon with\nprior linguistic knowledge and guided learning from a POS-annotated corpus,\nachieving accuracy of 97.98%, which is a significant improvement over the\nstate-of-the-art for Bulgarian.\n