About: http://webisa.webdatacommons.org/449441389

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	Drugs such as sildenafil (Viagra), vardenafil (Levitra), and tadalafil (Cialis) may be used to treat impotence.
http://www.w3.org/ns/prov#wasQuotedFrom	vidanthealth.com