About: http://webisa.webdatacommons.org/40768318

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	In some embodiments, the annulus fluid may be foamed using a gas, such as carbon dioxide or nitrogen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com