About: http://webisa.webdatacommons.org/357068556

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	4 All walking radii refer to straight-line distances ???as the crow flies???, without regard to roadway configuration, property ownership or other barriers.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com