KONVENS 2000 / Sprachkommunikation, Vorträge der gemeinsamen Veranstaltung 5. Konferenz zur Verarbeitung natürlicher Sprache (KONVENS), 6. ITG-Fachtagung "Sprachkommunikation"
Building a large annotated corpus of English: the penn treebank
Computational Linguistics - Special issue on using large corpora: II
Using the web as an implicit training set: application to structural ambiguity resolution
HLT '05 Proceedings of the conference on Human Language Technology and Empirical Methods in Natural Language Processing
EACL '09 Proceedings of the 12th Conference of the European Chapter of the Association for Computational Linguistics
Identifying non-elliptical entity mentions in a coordinated NP with ellipses
Journal of Biomedical Informatics
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Finding coordinations provides useful information for many NLP endeavors. However, the task has not received much attention in the literature. A major reason for that is that the annotation of major treebanks does not reliably annotate coordination. This makes it virtually impossible to detect coordinations in which two conjuncts are separated by punctuation rather than by a coordinating conjunction. In this paper, we present an annotation scheme for the Penn Treebank which introduces a distinction between coordinating from non-coordinating punctuation. We discuss the general annotation guidelines as well as problematic cases. Eventually, we show that this additional annotation allows the retrieval of a considerable number of coordinate structures beyond the ones having a coordinating conjunction.