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    { "id" : "http://dbpedia.org/resource/Nuclear_pulse_propulsion"
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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Nuclear pulse propulsion or external pulsed plasma propulsion, is a hypothetical method of spacecraft propulsion that uses nuclear explosions for thrust. It was first developed as Project Orion by DARPA, after a suggestion by Stanislaw Ulam in 1947. Newer designs using inertial confinement fusion have been the baseline for most post-Orion designs, including Project Daedalus and Project Longshot." ] ,
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