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Erschienen in:
2015 | OriginalPaper | Buchkapitel
Analysing the Role of Representation Choices in Portuguese Relation Extraction
verfasst von : Sandra Collovini, Marcelo de Bairros P. Filho, Renata Vieira
Erschienen in: Experimental IR Meets Multilinguality, Multimodality, and Interaction
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Relation Extraction is the task of identifying and classifying the semantic relations between entities in text. This task is one of the main challenges in Natural Language Processing. In this work, the relation extraction task is treated as sequence labelling problem. We analysed the impact of different representation schemes for the relation descriptors. In particular, we analysed the BIO and IO schemes performance considering a Conditional Random Fields classifier for the extraction of any relation descriptor occurring between named entities in the Organisation domain (Person, Organisation, Place). Overall, the classifier proposed here presents the best results using the IO notation.