About: http://webisa.webdatacommons.org/407455280

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	The northwest passage is not open most years, and is not open very long in years when it was open, but I think it has been open before.
http://www.w3.org/ns/prov#wasQuotedFrom	onearth.org