NorGramBank: A ‘Deep’ Treebank for Norwegian
Helge Dyvik, Paul Meurer, Victoria Rosén, Koenraad De Smedt, Petter Haugereid, Gyri Smørdal Losnegaard, Gunn Inger Lyse, Martha Thunes · 2016
We present NorGramBank, a treebank for Norwegian with highly detailed LFG analyses.It is one of many treebanks made available through the INESS treebanking infrastructure.NorGramBank was constructed as a parsebank, i.e. by automatically parsing a corpus, using the wide coverage grammar NorGram.One part consisting of 350,000 words has been manually disambiguated using computer-generated discriminants.A larger part of 50 M words has been stochastically disambiguated.The treebank is dynamic: by global reparsing at certain intervals it is kept compatible with the latest versions of the grammar and the lexicon, which are continually further developed in interaction with the annotators.A powerful query language, INESS Search, has been developed for search across formalisms in the INESS treebanks, including LFG c-and f-structures.Evaluation shows that the grammar provides about 85% of randomly selected sentences with good analyses.Agreement among the annotators responsible for manual disambiguation is satisfactory, but also suggests desirable simplifications of the grammar.