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    { "id" : "http://dbpedia.org/resource/Indiana_Gas_Boom"
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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The Indiana Gas Boom was a period of active drilling and production of natural gas in the Trenton Gas Field, in the US state of Indiana and the adjacent northwest part of Ohio  The boom began in the early 1880s and lasted into the early twentieth century.When the Indiana natural gas belt was discovered, the citizens were unaware of what they had found; nearly a decade passed without action to recover the resource." ] ,
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