About: http://webisa.webdatacommons.org/123410384

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	wherein Y is a hydrogen, a C1 to C5 alkyl group, preferably hydrogen or a methyl group, more preferably hydrogen;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com