About: http://webisa.webdatacommons.org/39941934

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	Some gases are also trapped in these rocks, such as hydrogen and helium.
http://www.w3.org/ns/prov#wasQuotedFrom	wikibooks.org