Assertion: heart attack | /r/CreatedBy | clot
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Heart attack usually is caused by a clot that stops blood flow supplying oxygen to an area of heart muscle, which results in heart muscle death.
text: A heart attack is a blockage of blood flow to the heart, often caused by a clot or build-up of plaque lodging in the coronary artery (a blood vessel that carries blood to part of the heart muscle).