About: http://webisa.webdatacommons.org/127187517

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	Special caution for all nitrate medications: Do not use if you are taking medications to treat erectile dysfunction, such as tadalafil (Cialis), vardenafil (Levitra), or sildenafil (Viagra).
http://www.w3.org/ns/prov#wasQuotedFrom	patienteducationcenter.org