Aligning the Norwegian UD Treebank with Entity and Coreference Information

• Main Authors: Jørgensen, Tollef Emil, Kåsen, Andre
• Format: Journal Article
• Language: English
• Published: 22-05-2023
• Subjects: Computer Science - Computation and Language
• DOI: 10.48550/arxiv.2305.13527

This paper presents a merged collection of entity and coreference annotated
data grounded in the Universal Dependencies (UD) treebanks for the two written
forms of Norwegian: Bokm{\aa}l and Nynorsk. The aligned and converted corpora
are the Norwegian Named Entities (NorNE) and Norwegian Anaphora Resolution
Corpus (NARC). While NorNE is aligned with an older version of the treebank,
NARC is misaligned and requires extensive transformation from the original
annotations to the UD structure and CoNLL-U format. We here demonstrate the
conversion and alignment processes, along with an analysis of discovered issues
and errors in the data - some of which include data split overlaps in the
original treebank. These procedures and the developed system may prove helpful
for future corpus alignment and coreference annotation endeavors. The merged
corpora comprise the first Norwegian UD treebank enriched with named entities
and coreference information.