About: http://webisa.webdatacommons.org/36889478

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	E is an oxygen atom, a sulfur atom or a group of the formula: ???NR4???, wherein R4 is a hydrogen atom or a C1-C7 alkanoyl group;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com