About: http://webisa.webdatacommons.org/419746573

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	Well, Viagra is a PDE5 inhibitor, meaning that it belongs to the class of drugs of that name.
http://www.w3.org/ns/prov#wasQuotedFrom	viagramanual.com