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<p>The online world is populated by an increasing number of knowledge-rich resources, and there is a growing trend among authors to provide a semantic markup of these resources. This presents a tantalizing prospect. Perhaps the person-years of effort invested in building these knowledge-rich resources can be leveraged to create large-scale knowledge bases. </p> <p>The World Fact Book knowledge base project has been an experiment in exploring that prospect by constructing a large-scale KB from an SGML source document. The content of the KB is, in large part, derived from the CIA World Fact Book, and it covers a broad range of information about the world's nations.</p> <p>The authors describe the process used to construct the WFB KB, discuss some of the key representational issues addressed, and show how the resulting representation can be used to answer a variety of queries. </p>

A. Farquhar, G. Frank and R. Fikes, "Building a Large Knowledge Base from a Structured Source," in IEEE Intelligent Systems, vol. 14, no. , pp. 47-54, 1999.
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