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    { "id" : "http://dbpedia.org/resource/Klystron"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian, which is used as an amplifier for high radio frequencies, from UHF up into the microwave range." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Klystron.jpg?width=300"] } } }
