About: http://webisa.webdatacommons.org/82779554

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	Alternatively, other types of gas, such as pure oxygen, pure nitrogen or some other ionizable element or compound that can generate a specific kind of free radical, could also be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr