About: http://webisa.webdatacommons.org/69364358

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	2012 Forum ??? ORIGIN OF OXYGEN IN EARTH'S ATMOSPHERE... claim that the original atmosphere of the Earth was composed from ... nitrogen (N2 -78%), oxygen (O2??? 21%), and other gases such as water and carbon dioxide. ...
http://www.w3.org/ns/prov#wasQuotedFrom	answerparty.com