About: http://webisa.webdatacommons.org/211250623

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	They could be either water based or oil based, and can be formed using gases such as nitrogen or carbon dioxide.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com