 
 <translate> Context: "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. Released as a single, it reached No. 12 on the Billboard Hot 100 singles chart. Described by Dylan biographer Clinton Heylin as "an exercise in splendid simplicity," the song, measured simply in terms of the number of other artists who have covered it, is one of Dylan's most popular post-1960s compositions.

Question: who wrote the song knocking on heaven's door?
Steam of consciousness below:
 <ibo> "Knockin' on Heaven's Door" bụ abụ nke Bob Dylan dere ma bụrụ, maka ụda egwu nke ihe nkiri 1973 Pat Garrett na Billy the Kid. E wepụtara ya dị ka otu, ọ ruru No. 12 na chaatị Billboard Hot 100. Onye na-ede akụkọ ndụ Dylan bụ Clinton Heylin kọwara ya dị ka "omume dị n'ụzọ dị mfe", abụ ahụ, nke a tụrụ n'ụzọ dị mfe n'ihe gbasara ọnụ ọgụgụ ndị na-ese ihe ndị ọzọ kpuchiri ya, bụ otu n'ime ihe ndị kachasị ewu ewu na Dylan mgbe afọ 1960 gasịrị.  Ajụjụ: ònye dere abụ ahụ na-akụ aka n'ọnụ ụzọ eluigwe? Steam nke ịmara n'okpuru: 