Assertion: mouth ulcer | /r/HasProperty | a sign of oral cancer
Facets:
value: rarely
type: DEGREE
value: sometimes
type: TEMPORAL
Source sentences:
text: Rarely, a mouth ulcer that does not heal may be a sign of oral cancer.
text: Rarely, a mouth ulcer that does not heal may be a sign of oral cancer.
text: A mouth ulcer that does not clear up is sometimes a sign of oral cancer.