Conversation so far:
What was Hanson's hit song?
Hanson are best known for the 1997 hit song MMMBop from their debut album.
What album did Hanson release?
Middle of Nowhere is the debut studio album by American pop rock group Hanson.
What day was Hanson's debut album released?
Hanson's debut album was released May 6, 1997.

Question: What year
Self-contained rewrite: What year was Hanson's debut album released?