{ "items" : [
    { "id" : "http://dbpedia.org/resource/Tribology"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Tribology  is the science and engineering of interacting surfaces in relative motion. It includes the study and application of the principles of friction, lubrication and wear. Tribology is a branch of mechanical engineering and materials science."] } } }
