About: http://webisa.webdatacommons.org/46993534

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	Such systems typically include a pump for injecting an odorant into a system, and some timer or other controller to effect actuation of the pump at predetermined intervals.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com