user: Question: What is the first broadcast date for episode 3x10?
Columns: ['Episode', 'First broadcast', 'Rufus guest', 'Marcus guest', 'Winner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['3x01', '2 February 2010', 'Johnny Vegas', 'Chris Addison', 'Blue (4–0)']
SQL:

assistant: SELECT "First broadcast" FROM "Table" WHERE "Episode" = '3x10';