Conversation so far:
What number album was Epiphany for T-Pain?
Epiphany was T-Pain's second album.
What was the result of T-Pain's album, Epiphany release?
The Epiphany album sold 171,000 records in its first week, reaching number one on the Billboard 200.
What else happened after T-Pain's album, Epiphany released?
Epiphany has since sold 819,000 records in the United States.

Question: When was Epiphany released?
Self-contained rewrite: When was T-Pain's album, Epiphany released?