About: http://webisa.webdatacommons.org/428164584

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	Preferably, the catalyst is a salt, oxide or organometallic derivative of either antimony, titanium, tin or germanium, with tin compounds being the most preferred for reasons of catalyst activity.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es