Conversation so far:
When did Shinee debut with their first release?
On May 22, 2008, the group's first EP, Replay, was released.
How well did Shinee's Replay EP do?
The group's Replay debuted at number ten on the Korean music charts and peaked at number eight, selling 17,957 copies in the first half of 2008.

Question: what was the name of their debut album?
Self-contained rewrite: What was the name of Shinee's debut album?