Assertion: ulcer's stomach | /r/HasProperty | due
Facets:
value: to one of two causes
type: CAUSE
value: usually
type: DEGREE
Source sentences:
text: Stomach and duodenal ulcers are usually due to one of two causes: the bacterium Helicobacter pylori or nonsteroidal anti — inflammatory drugs (NSAIDs) like aspirin, ibuprofen, and naproxen.