About: http://webisa.webdatacommons.org/5955155

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 formula (A), M is not particularly limited as long as it is not an alkali metal, but is preferably a titanium atom, an aluminum atom, a zirconium atom, or a silicon atom.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com