Conversation so far:
who played guitar in the beatles song while my guitar gently weeps
Eric Clapton overdubbed a lead guitar part, although he was not formally credited for his contribution.
when was the beatles song while my guitar gently weeps released
While My Guitar Gently Weeps was released on the 22nd of November in 1968.

Question: who wrote the song
Self-contained rewrite: who wrote the beatles song while my guitar gently weeps