About: http://webisa.webdatacommons.org/207109511

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	To help the smartphone calibrate and adjust to a user's individual stride length, the user must initially use touch to detect the landmarks in their environment, such as corridor intersections, doors and elevators.
http://www.w3.org/ns/prov#wasQuotedFrom	newscientist.com