{ "items" : [
    { "id" : "http://dbpedia.org/resource/Chemical_composition"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The chemical composition (or simply composition) is a concept in chemistry that has different (but similar) meanings if referred to a single pure substance or a mixture."] } } }
