| http://www.w3.org/ns/prov#value | - Held on Patriots??? Day ??? which marks the start of the American Revolution ??? the Boston Marathon is an international event that attracts 20,000 runners and a half-million spectators. ???The large crowds, global visibility and historic nature of the day make it an attractive target for terrorism and, therefore, a focus for disaster preparedness,??? says Ferrer.
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