About: http://webisa.webdatacommons.org/243051133

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	One preferred approach is photoplethysmography where an infrared light source and corresponding sensor measure infrared light either reflected from or transmitted through the wrists or other body part of the user.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com