Conversation so far:
What were the orgins of The Beatles' Free as a Bird song?
Paul McCartney, George Harrison and Ringo Starr wanted to record incidental background music for The Beatles Anthology project.
What did The Beatles' realize about Free as a Bird?
Paul McCartney, George Harrison and Ringo Starr realized that they wanted to record new music incorporating John Lennon's unreleased recordings.
What kind of sound is the song free as a bird inspired by
why is the 1995 song by the Beatles called free as a bird
Who was involved with The Beatles' Free as a Bird song originally?
Free as a Bird was recorded by John Lennon in 1977, in his and Yoko Ono's Dakota building apartment in New York City, but was not complete.

Question: anything else interesting about this song?
Self-contained rewrite: Is there anything else interesting about The Beatles' Free as a Bird song?