A novel method is demonstrated that allows semantic and well-structured knowledge bases (such as DBpedia) to be easily queried directly from Wikipedias pages. Using Swipe, naive users with no knowledge of RDF triples and SPARQL can easily query DBpedia with powerful questions such as: Who are the U.S. presidents who took office when they were 55-year old or younger, during the last 60 years, or Find the town in California with less than 10 thousand people. This is accomplished by a Search by Example (SBE) ap- proach where a user can enter the query conditions directly on the Infobox of a Wikipedia page. In fact, Swipe activates certain fields of Wikipedia to allow users to enter query con- ditions that are used to generate equivalent SPARQL queries executed on DBpedia. Finally, Swipe returns the query re- sults to in a form that is conducive to query refinements and further explorations. This SBE approach makes semistruc- tured documents queryable in an intuitive and friendly way and, through Wikipedia, delivers the benefits of querying and exploring large knowledge bases to all web users.
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