About: http://webisa.webdatacommons.org/5216390

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	Loop systems also can be open, -- meaning the fluid inside the pipes is water drawn from surface or underground sources, such as lakes or wells -- or closed.
http://www.w3.org/ns/prov#wasQuotedFrom	washingtonpost.com