About: http://webisa.webdatacommons.org/39648242

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	Hetero atoms are preferably represented by oxygen, sulphur or nitrogen and hetero groups by N-alkyl, the alkyl of the N-alkyl group preferably containing 1 to 4, in particular 1 or 2, carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com