About: http://webisa.webdatacommons.org/254917587

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	Gaseous elements, such as oxygen, can be taken up during heating or, alternatively, in a subsequent step, and the pressure of the system can be varied during the synthesis process.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es