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    { "id" : "http://dbpedia.org/resource/Induction_coil"
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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "An induction coil or \"spark coil\" (archaically known as an inductorium or Ruhmkorff coil after Heinrich Ruhmkorff) is a type of electrical transformer used to produce high-voltage pulses from a low-voltage direct current (DC) supply.  To create the flux changes necessary to induce voltage in the secondary, the direct current in the primary is repeatedly interrupted by a vibrating mechanical contact called an interrupter." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Induktionsapparat_hg.jpg?width=300"] } } }
