About: http://webisa.webdatacommons.org/387602225

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	Real life is full of examples of gases separating out and forming layers..
http://www.w3.org/ns/prov#wasQuotedFrom	wattsupwiththat.com