About: http://webisa.webdatacommons.org/3612593

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	sulphur atom and each Y is a nitrogen or carbon atom, with the proviso that boty Y's can not simultaneously be nitrogen,
http://www.w3.org/ns/prov#wasQuotedFrom	google.com