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    { "id" : "http://dbpedia.org/resource/Arc_converter"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The arc converter, sometimes called the arc transmitter or Poulsen arc after Danish engineer Valdemar Poulsen who invented it in 1903, was an early type of radio transmitter.  The arc converter used an electric arc to convert direct current electricity into radio frequency alternating current." ] ,
        "http://xmlns.com/foaf/0.1/depiction" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Poulsen_arc_1MW_transmitter.jpg" ] ,
        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Poulsen_arc_1MW_transmitter.jpg?width=300"] } } }
