About: http://webisa.webdatacommons.org/22545574

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	These transition metal catalyst systems can be non-supported or supported, for example, silica gel, or metal oxides and dihalides, such as MgO, MgCl2, ZnCl2, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au