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    { "id" : "http://dbpedia.org/resource/History_of_rapid_transit"
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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Rapid transit in London began with the opening in 1863 of the Metropolitan Railway, now part of the London Underground. However, the smoke caused discomfort for passengers in operating steam trains through tunnels and limited the appeal of this mode of transport. Between 1863 to 1890 there were numerous proposals to build pneumatic or cable-hauled railways in London to overcome this problem, but none proved successful." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Constructing_the_Metropolitan_Railway.png?width=300"] } } }
