Assertion: ulcer | /r/HasProperty | cancerous
Facets:
value: sometimes
type: TEMPORAL
value: in older persons
type: LOCATION
Source sentences:
text: Ulcers in the mouth and throat are frequently caused by infection but are sometimes cancerous, especially in older persons.
text: Ulcers are neither cancerous, or contagious; duodenal ulcers are nearly always benign, and stomach ulcers may become malignant.
text: The tube assists the doctor in seeing ulcers, as well as obtaining tissue samples for examination under a microscope to find out if the person's ulcer is cancerous.