Assertion: heart attack's symptom | /r/HasProperty | subtle
Facets:
Source sentences:
text: A heart attack can often begin with subtle symptoms, and with mild discomfort versus full-on pain.
text: About half of all heart attacks are silent, meaning the symptoms are so subtle, the person didn't even know they had one, according to a study in the journal Circulation.
text: Those symptoms can be subtle — perhaps one reason why some people don’t make it to an emergency room