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    { "id" : "http://dbpedia.org/resource/Tar"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Tar is a black mixture of hydrocarbons and free carbon  obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. Production and trade in pine-derived tar was a major contributor in the economies of Northern Europe and Colonial America. Its main use was in preserving wooden vessels against rot. The largest user was the Royal Navy." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Corn_Stover_Tar_from_Pyrolysis_by_Microwave_Heating.jpg?width=300"] } } }
