{ "items" : [
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          "http://caligraph.org/ontology/Oil_company_of_Asia",
          "http://caligraph.org/ontology/Oil_company_of_Europe" ] ,
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://en.wikipedia.org/wiki/Category:Oil_companies_of_Russia" ] } },

    { "id" : "http://caligraph.org/ontology/Defunct_oil_company_of_Russia"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#subClassOf" : [ "http://caligraph.org/ontology/Oil_company_of_Russia"] } } }
