About: http://webisa.webdatacommons.org/3661757

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	Also, one of the uncertainties that arises when performing mud-gas analysis at the surface is determining the true ???background??? level of the gas.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au