About: http://webisa.webdatacommons.org/258402832

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	Si(OR1)4 or Si(R2)n(OR1)4-n (wherein each of R1 and R2 is an alkyl or acyl group, particularly an alkyl group having 1 to 5 carbon atoms or an acyl group having 2 to 6 carbon atoms, and n is an integer of 1 to 3).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com