{ "items" : [
    { "id" : "http://dbpedia.org/resource/Thallium"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Thallium is a chemical element with symbol Tl and atomic number 81. This soft gray post-transition metal is not found free in nature. When isolated, it resembles tin, but discolors when exposed to air. Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production. Both used the newly developed method of flame spectroscopy, in which thallium produces a notable green spectral line." ] ,
        "http://www.w3.org/2002/07/owl#differentFrom" : [ "http://dbpedia.org/resource/Thulium",
          "http://dbpedia.org/resource/Thorium"] } } }
