{ "items" : [
    { "id" : "http://dbpedia.org/resource/Shock_wave"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A shock wave is a type of propagating disturbance.  When a wave moves faster than the speed of sound in a liquid, gas or plasma (a fluid, in physics terminology) it is a shock wave.  Like an ordinary wave, a shock wave carries energy, and can propagate through a medium.  It is characterized by an abrupt, nearly discontinuous change in pressure, temperature and density of the medium." ] ,
        "http://xmlns.com/foaf/0.1/depiction" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Schlierenfoto_Mach_1-2_Pfeilflügel_-_NASA.jpg" ] ,
        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Schlierenfoto_Mach_1-2_Pfeilflügel_-_NASA.jpg?width=300"] } } }
