| http://www.w3.org/ns/prov#value | - Unluckily for you, the number involved may be less than zero:???The net economic impact of professional sports in Washington, D.C., and the 36 other cities that hosted professional sports teams over nearly 30 years, was a reduction in real per capita income over the entire metropolitan area,??? Humphreys and Coates noted in the report.The researchers found other patterns consistent with the presen
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