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    { "id" : "http://dbpedia.org/resource/Rocket_engine"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A rocket engine is a type of jet engine that uses only stored rocket propellant mass for forming its high speed propulsive jet. Rocket engines are reaction engines, obtaining thrust in accordance with Newton's third law. Most rocket engines are internal combustion engines, although non-combusting forms (such as cold gas thrusters) also exist. Vehicles propelled by rocket engines are commonly called rockets." ] ,
        "http://www.w3.org/2000/01/rdf-schema#seeAlso" : [ "http://dbpedia.org/resource/Specific_impulse",
          "http://dbpedia.org/resource/Ion_thruster",
          "http://dbpedia.org/resource/Liquid_rocket_propellant" ] ,
        "http://xmlns.com/foaf/0.1/depiction" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/RS-68_rocket_engine_test.jpg" ] ,
        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/RS-68_rocket_engine_test.jpg?width=300"] } } }
