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    { "id" : "http://dbpedia.org/resource/Solid-fuel_rocket"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A solid-fuel rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/oxidizer). The earliest rockets were solid-fuel rockets powered by gunpowder; they were used in warfare by the Chinese, Indians, Mongols and Arabs, as early as the 13th century.All rockets used some form of solid or powdered propellant up until the 20th century, when liquid-propellant rockets offered more efficient and controllable alternatives." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://en.wikipedia.org/wiki/Special:FilePath/Space_Shuttle_Columbia_launching.jpg?width=300"] } } }
