Original: John Fitzgerald "Jack" Kennedy  (May 29, 1917 – November 22, 1963), often referred to by his initials JFK, was the 35th President of the United States, serving from 1961 until his assassination in 1963.
Simplified: John Fitzgerald Kennedy (May 29, 1917 - November 22, 1963), also  known as JFK, was the 35th president of the United States of America.