Abstract

In this paper we present a system for the 2016 edition of the Open Knowledge Extraction (OKE) Challenge. The OKE challenge promotes research in automatic extraction of structured content from textual data and its representation and publication as Linked Data. The proposed system addresses the second task of the challenge, namely “Class Induction and entity typing for Vocabulary and Knowledge Base enrichment” and combines state-of-the-art lexically-based Natural Language Processing (NLP) techniques with lexical and semantic knowledge bases to first extract hypernyms from definitional sentences and second select the most suitable class of the extracted hypernyms from those available in the DOLCE foundational ontology.

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