About: http://webisa.webdatacommons.org/3244028

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	Suitable environments that can be used are a vacuum (preferably less than 20 mm Hg), or alternatively, nitrogen, an inert gas, such as argon, or combinations thereof.Pyrolysis can be done in one or more stages.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com