Conversation so far:
Who did the recording of The Beatles' Free as a Bird?
Paul McCartney, George Harrison, Ringo Starr, Geoff Emerick, Jon Jacobs and Jeff Lynne worked on the recording of The Beatles' Free as a Bird song.
Who produced The Beatles' Free as a Bird song?
Jeff Lynne produceed The Beatles' Free as a Bird song.

Question: When was the song produced?
Self-contained rewrite: When was The Beatles' Free as a Bird song produced?