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Bridging the Gap Between Ontology and Lexicon via Class-Specific Association Rules Mined from a Loosely-Parallel Text-Data Corpus

Authors Basil Ell , Mohammad Fazleh Elahi , Philipp Cimiano

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Author Details

Basil Ell
  • CIT-EC, University of Bielefeld, Germany
  • Department of Informatics, University of Oslo, Norway
Mohammad Fazleh Elahi
  • CIT-EC, University of Bielefeld, Germany
Philipp Cimiano
  • CIT-EC, University of Bielefeld, Germany

Funding

This work has been supported by the EU’s Horizon 2020 project Prêt-à-LLOD (grant agreement No 825182) and by the SIRIUS centre: Norwegian Research Council project No 237898.

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Basil Ell, Mohammad Fazleh Elahi, and Philipp Cimiano. Bridging the Gap Between Ontology and Lexicon via Class-Specific Association Rules Mined from a Loosely-Parallel Text-Data Corpus. In 3rd Conference on Language, Data and Knowledge (LDK 2021). Open Access Series in Informatics (OASIcs), Volume 93, pp. 33:1-33:21, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021) https://doi.org/10.4230/OASIcs.LDK.2021.33

Abstract

There is a well-known lexical gap between content expressed in the form of natural language (NL) texts and content stored in an RDF knowledge base (KB). For tasks such as Information Extraction (IE), this gap needs to be bridged from NL to KB, so that facts extracted from text can be represented in RDF and can then be added to an RDF KB. For tasks such as Natural Language Generation, this gap needs to be bridged from KB to NL, so that facts stored in an RDF KB can be verbalized and read by humans. In this paper we propose LexExMachina, a new methodology that induces correspondences between lexical elements and KB elements by mining class-specific association rules. As an example of such an association rule, consider the rule that predicts that if the text about a person contains the token "Greek", then this person has the relation nationality to the entity Greece. Another rule predicts that if the text about a settlement contains the token "Greek", then this settlement has the relation country to the entity Greece. Such a rule can help in question answering, as it maps an adjective to the relevant KB terms, and it can help in information extraction from text. We propose and empirically investigate a set of 20 types of class-specific association rules together with different interestingness measures to rank them. We apply our method on a loosely-parallel text-data corpus that consists of data from DBpedia and texts from Wikipedia, and evaluate and provide empirical evidence for the utility of the rules for Question Answering.

Subject Classification

ACM Subject Classification
  • Computing methodologies → Information extraction
  • Computing methodologies → Natural language generation
Keywords
  • Ontology
  • Lexicon
  • Association Rules
  • Pattern Mining

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References

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