 
 <translate> The relevant sentence in the passage is: "Knockin' on Heaven's Door" is a song written and sung by Bob Dylan, for the soundtrack of the 1973 film Pat Garrett and Billy the Kid.
So, the answer is Bob Dylan. <ibo> Ahịrịokwu dị mkpa na amaokwu ahụ bụ: "Knockin' on Heaven's Door" bụ abụ nke Bob Dylan dere ma bụrụ, maka ụda nke ihe nkiri 1973 Pat Garrett na Billy the Kid. Ya mere, azịza ya bụ Bob Dylan. 