- Tytuł:
- Data-oriented parsing with discontinuous constituents and function tags
- Autorzy:
-
van Cranenburgh, A.
Scha, R.
Bod, R. - Powiązania:
- https://bibliotekanauki.pl/articles/103879.pdf
- Data publikacji:
- 2016
- Wydawca:
- Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
- Tematy:
-
discontinuous constituents
statistical parsing
tree-substitution grammar - Opis:
- Statistical parsers are effective but are typically limited to producing projective dependencies or constituents. On the other hand, linguistically rich parsers recognize non-local relations and analyze both form and function phenomena but rely on extensive manual grammar engineering. We combine advantages of the two by building a statistical parser that produces richer analyses. We investigate new techniques to implement treebank-based parsers that allow for discontinuous constituents. We present two systems. One system is based on a Linear Context-Free Rewriting System (LCFRS), while using a Probabilistic Discontinuous Tree-Substitution Grammar (PDTSG) to improve disambiguation performance. Another system encodes discontinuities in the labels of phrase-structure trees, allowing for efficient context-free grammar parsing. The two systems demonstrate that tree fragments as used in treesubstitution grammar improve disambiguation performance Chile capturing non-local relations on an as-needed basis. Additionally, we present results for models that produce function tags, resulting in a more linguistically adequate model of the data. We report substantial accuracy improvements in discontinuous parsing for German, English, and Dutch, including results on spoken Dutch.
- Źródło:
-
Journal of Language Modelling; 2016, 4, 1; 57-111
2299-856X
2299-8470 - Pojawia się w:
- Journal of Language Modelling
- Dostawca treści:
- Biblioteka Nauki
Artykuł