About: http://webisa.webdatacommons.org/109274979

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	In such a case, as indicated above, a cocatalyst or activator is usually needed, such as an alkylaluminum compound.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com