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ISWC'06 Proceedings of the 5th international conference on The Semantic Web
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ESWC'08 Proceedings of the 5th European semantic web conference on The semantic web: research and applications
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Web Semantics: Science, Services and Agents on the World Wide Web
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AIMSA'12 Proceedings of the 15th international conference on Artificial Intelligence: methodology, systems, and applications
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Search Computing
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Expert Systems with Applications: An International Journal
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Web Semantics: Science, Services and Agents on the World Wide Web
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Natural language interfaces offer end-users a familiar and convenient option for querying ontology-based knowledge bases. Several studies have shown that they can achieve high retrieval performance as well as domain independence. This paper focuses on usability and investigates if NLIs are useful from an end-user's point of view. To that end, we introduce four interfaces each allowing a different query language and present a usability study benchmarking these interfaces. The results of the study reveal a clear preference for full sentences as query language and confirm that NLIs are useful for querying Semantic Web data.