About: http://webisa.webdatacommons.org/193651673

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	When air or other suitable gaseous mixtures of nitrogen and oxygen are employed it is also preferred that the gas contain small amounts of carbon dioxide e.g. on the order of 2-5%.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr