About: http://webisa.webdatacommons.org/259949036

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	with the further proviso that when cerium is present, the catalyst further consists essentially of at least one more rare earth element other than cerium; and (b) recycling ethylene from the product stream back for use in Step (a). 2.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com