Assertion: heart attack | /r/AtLocation | brought
Facets:
value: usually
type: TEMPORAL
value: by exertion
type: CAUSE
Source sentences:
text: A heart attack may occur in people with angina (intermittent short-lived chest pain, usually brought on by exertion, caused by a narrowing in one or more of the arteries that supply the heart muscle), or it may occur out of the blue.