{ "items" : [
    { "id" : "http://dbpedia.org/resource/Project_Space_Track"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Project Space Track was a research and development project of the US Air Force, to create a system for tracking all artificial earth satellites and space probes, domestic and foreign.Project Space Track was started at the Air Force Cambridge Research Center at Laurence G. Hanscom Field, now Hanscom Air Force Base, in Bedford, Massachusetts shortly after the launch of Sputnik I."] } } }
