Assertion: colonoscopy | /r/HasProperty | the key
Facets:
value: to preventing cancer
type: PURPOSE
value: to early detection
type: PURPOSE
value: to prevention
type: PURPOSE
Source sentences:
text: Colonoscopy is the key to early detection and prevention Involves the formation of pouches (diverticula) on the outside of the colon
text: But they may also be the key to preventing cancer if a precancerous polyp is found and removed before it can become cancerous.