{ "items" : [
    { "id" : "http://dbpedia.org/resource/Gravity_tractor"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A gravity tractor (GT) is a theoretical spacecraft that would deflect another object in space, typically a potentially hazardous asteroid that might impact Earth, without physically contacting it, using only its gravitational field to transmit the required impulse." ] ,
        "http://www.w3.org/2000/01/rdf-schema#seeAlso" : [ "http://dbpedia.org/resource/Asteroid_impact_avoidance"] } } }
