 
<translate> Q: Passage: "A Song for You" bụ abụ nke onye na-agụ egwu rock na pianist Leon Russell dere ma dekọọ ya maka ọba egwu mbụ ya Leon Russell, nke ewepụtara na 1970 na Shelter Records. Ọ bụ otu n'ime abụ Russell ndị a kasị mara amara. E meela ya ma dekọọ ya site na ọtụtụ ndị na-ese ihe, na-ekpuchi ọtụtụ ụdị egwu. Elton John akpọọla abụ ahụ American classic.  Ajụjụ: Dabere n'ihe e kwuru n'ebe a, ònye dere abụ maka gị, ọ̀ bụ Leon Russell ka ọ̀ bụ Donny Hathaway? Ka anyị nye stream nke nsụhọ n'okpuru <eng> Q: Passage: "A Song for You" is a song written and originally recorded by rock singer and pianist Leon Russell for his first solo album Leon Russell, which was released in 1970 on Shelter Records. A slow, pained plea for forgiveness and understanding from an estranged lover, the tune is one of Russell's best-known compositions. It has been performed and recorded by an array of artists, spanning many musical genres. Elton John has called the song an American classic.

Question: Based on this passage, who wrote a song for you leon russell or donny hathaway?
Let's give stream of consciousness below
 