Arc-Hybrid Non-Projective Dependency Parsing with a Static-Dynamic Oracle

de Lhoneux, Miryam,1990-Uppsala universitet,Institutionen för lingvistik och filologi,Computational Linguistics (author)

We extend the arc-hybrid transition system for dependency parsing with a SWAP transition that enables reordering of the words and construction of non-projective trees. Although this extension potentially breaks the arc-decomposability of the transition system, we show that the existing dynamic oracle can be modified and combined with a static oracle for the SWAP transition. Experiments on five languages with different degrees of non-projectivity show that the new system gives competitive accuracy and is significantly better than a system trained with a purely static oracle.

Stymne, Sara,1977-Uppsala universitet,Institutionen för lingvistik och filologi,Computational Linguistics(Swepub:uu)sarst212 (author)
Nivre, Joakim,1962-Uppsala universitet,Institutionen för lingvistik och filologi,Computational Linguistics(Swepub:uu)joani384 (author)
Uppsala universitetInstitutionen för lingvistik och filologi (creator_code:org_t)

In:IWPT 2017 15th International Conference on Parsing TechnologiesPisa, Italy : Association for Computational Linguistics, s. 99-1049781945626739

By the author/editor: de Lhoneux, Miry ...; Stymne, Sara, 19 ...; Nivre, Joakim, 1 ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Computer and Inf ...; and Language Technol ...

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