About: http://webisa.webdatacommons.org/441609741

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	A separate subsystem is used for injecting metered amounts of a purifying solution, for example chlorine, into the water to control bacteria growth.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com