Assertion: pancreatic cancer's stage | /r/Causes | symptom
Facets:
value: rarely
type: DEGREE
value: often
type: TEMPORAL
Source sentences:
text: The early stage of the disease often causes no symptoms, which is why the cancer is so deadly: It’s usually caught only when it becomes large and spreads outside of the gland.
text: Early stages of pancreatic cancer rarely cause symptoms.