About: http://webisa.webdatacommons.org/390322412

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	If one is uncertain about or wants to see all possibilities for a given feature, then leave it unspecified whether the feature is a charge, stereochemistry, bond value, or attachments at a particular position.
http://www.w3.org/ns/prov#wasQuotedFrom	istl.org