Assertion: colonoscopy | /r/HasProperty | unique
Facets:
value: in can be effective
type: MANNER
value: among cancer screening tests
type: OTHER
Source sentences:
text: Colonoscopies are unique among cancer screening tests in that they can be effective in both early detection and prevention.
text: Colonoscopies are unique because you must completely empty the bowel to give your doctor a clear view of your colon.