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    { "id" : "http://dbpedia.org/resource/Electromagnetic_tensor"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In electromagnetism, the electromagnetic tensor or electromagnetic field tensor (sometimes called the field strength tensor, Faraday tensor or Maxwell bivector) is a mathematical object that describes the electromagnetic field of a physical system. The field tensor was first used after the 4-dimensional tensor formulation of special relativity was introduced by Hermann Minkowski. The tensor allows some physical laws to be written in a very concise form." ] ,
        "http://www.w3.org/2002/07/owl#differentFrom" : [ "http://dbpedia.org/resource/Electric_field",
          "http://dbpedia.org/resource/Magnetic_field" ] ,
        "http://www.w3.org/2000/01/rdf-schema#seeAlso" : [ "http://dbpedia.org/resource/Classical_field_theory"] } } }
