Assertion: heart attack | /r/CapableOf | happen enough oxygen
Facets:
Source sentences:
text: A heart attack happens when the flow of oxygen-rich blood in one or more of the coronary arteries, which supply the heart muscle, suddenly becomes blocked, and a section of heart muscle can’t get enough oxygen.
text: It happens when the blood supply to the heart becomes blocked, and the heart muscle does not receive enough oxygen.