I want to know the answer to the following question:
In what year did Eisenhower have a heart attack?
All the background I'm provided with is that "During his recovery from a heart attack late in 1955, he huddled with his closest advisors to evaluate the GOP's potential candidates; the group, in addition to his doctor, concluded a second term was well advised, and he announced in February 1956 he would run again.". Is that enough to answer the question?
Answer: yes