About: http://webisa.webdatacommons.org/203396995

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	s ##STR2## (wherein each of R3 and R4 is a hydrogen atom, an alkyl group, a hydroxyl group or an amino group), M is a titanium atom, a zirconium atom or a silicon atom, and X is a fluorine atom, a chlorine atom or a bromine atom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com