<http://dbpedia.org/resource/Gulfstream_X-54>	<http://dbpedia.org/ontology/numberBuilt>	"0"^^<http://www.w3.org/2001/XMLSchema#integer> .
<http://dbpedia.org/resource/Gulfstream_X-54>	<http://dbpedia.org/ontology/type>	<http://dbpedia.org/resource/Experimental_aircraft> .
<http://dbpedia.org/resource/Gulfstream_X-54>	<http://www.w3.org/2000/01/rdf-schema#comment>	"The Gulfstream X-54 is a proposed research and demonstration aircraft, under development in the United States by Gulfstream Aerospace for NASA, that is planned for use in sonic boom and supersonic transport research."@en .
<http://dbpedia.org/resource/Gulfstream_X-54>	<http://dbpedia.org/ontology/manufacturer>	<http://dbpedia.org/resource/Gulfstream_Aerospace> .