About: http://webisa.webdatacommons.org/417742937

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Bruce Hoffman, a terrorism expert at Georgetown University, said that a marathon was a particularly difficult event to secure.
http://www.w3.org/ns/prov#wasQuotedFrom	staradvertiser.com