About: http://webisa.webdatacommons.org/74593812

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	R8 and R9, which are identical or different, represent a hydrogen atom, a halogen atom such as bromine, chlorine, iodine or fluorine, a C1???C4 alkyl or C1???C4 alkoxy radical, a ???CN radical,
http://www.w3.org/ns/prov#wasQuotedFrom	google.com