Assertion: unstable angina | /r/HasProperty | precursor
Facets:
value: often
type: TEMPORAL
value: to a myocardial infarction
type: TRANSITIVE-OBJECT
value: to a heart attack
type: TRANSITIVE-OBJECT
Source sentences:
text: Unstable angina is often a precursor to a heart attack.
text: Unstable angina is caused by poor blood flow through the blood vessels of the heart muscle, and is often a precursor to a myocardial infarction.