Conversation so far:
Who is Buffalo Springfield?
A Canadian-American rock band.
What did Buffalo Springfield do?
The band would release three albums.
What albums did the band Buffalo Springfield release?
Buffalo Springfield would release three albums: Buffalo Springfield, Buffalo Springfield Again, and Last Time Around.
What Buffalo Springfield album was the most popular?
Barry Gifford called Last Time Around Buffalo Springfield's most beautiful record.

Question: What song was most popular?
Self-contained rewrite: What Buffalo Springfield song was most popular?