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. He was in office from 1961 until he was assassinated (shot dead) in 1963.