user: Question: When was episode 2x11 aired for the first time?
Columns: ['Episode', 'First broadcast', 'Rufus guest', 'Marcus guest', 'Winner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2x01', '23 March 2009', 'Chris Addison', 'Dara Ó Briain', 'Red (3–2)']
SQL:

assistant: SELECT "First broadcast" FROM "Table" WHERE "Episode" = '2x11';