About: http://webisa.webdatacommons.org/338158978

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	When the end of your white cane starts hitting these bumps (or you feel them under your feet), it means you are approaching a danger zone such as a street or tracks....
http://www.w3.org/ns/prov#wasQuotedFrom	bikeportland.org