user: Question: What was the first broadcast date of episode 4x03?
Columns: ['Episode', 'First broadcast', 'Seans team', 'Daves team', 'Scores']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['4x01', '20 October 2006', 'Nikki Grahame and Rich Hall', 'Boy George and Lee Mack', '5–6']
SQL:

assistant: SELECT "First broadcast" FROM "Table" WHERE "Episode" = '4x03';