Conversation so far:
Who wrote the song Hound Dog?
Hound Dog is a twelve-bar blues song written by Jerry Leiber and Mike Stoller.
On what side of the record was the song Hound Dog?
Elvis Presley's 1956 Hound Dog was released as the B-side to the single Don't Be Cruel.
In what year was Elvis Presley's Hound Dog released?
Elvis Presley's Houng Dog was released in 1956.

Question: What date
Self-contained rewrite: What date was Elvis Presley's Houng Dog released?