About: http://webisa.webdatacommons.org/183698521

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	Solvents, monomers such as ethylene and propylene were first purified by passing through a three-column purification system.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com