{ "items" : [
    { "id" : "http://dbpedia.org/resource/Polyolefin"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A polyolefin is any of a class of polymers produced from a simple olefin (also called an alkene with the general formula CnH2n) as a monomer. For example, polyethylene is the polyolefin produced by polymerizing the olefin ethylene.  Polypropylene is another common polyolefin which is made from the olefin propylene." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Gateway-Tracing-Paper.jpg?width=300"] } } }
