About: http://webisa.webdatacommons.org/437995853

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	Bleeding duodenal ulcer is the most frequent cause of massive upper gastrointestinal (GI) hemorrhage, but bleeding may also occur because of gastric ulcers, gastritis, and esophageal varices.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com