Conversation so far:
Who is Buffalo Springfield?
Stills, Furay, and Young reunited in Los Angeles and formed the core of Buffalo Springfield.
What did Buffalo Springfield do?
The band would release three albums.
What albums did the band release?
Buffalo Springfield, Buffalo Springfield Again, and Last Time Around.

Question: What album was the most popular?
Self-contained rewrite: What album of Buffalo Springfield's was the most popular?