About: http://webisa.webdatacommons.org/309098180

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	The respective R1 s may be the same or different and each represent hydrogen atom, a silyl group or a hydrocarbon radical such as alkyl, alkenyl, aryl, alkylaryl, arylalkyl, etc. each of 1 to 20 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es