PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • If the Sept. 11, 2001, terrorist attacks were a wake-up call to how vulnerable the nation's infrastructure is, steps taken since by the federal government have attempted to make everyday life safer for Americans.
http://www.w3.org/ns/prov#wasQuotedFrom
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