user: Question: When was the episode with Amy Williams as Andrew and Jack's guest broadcast?
Columns: ['Episode', 'First broadcast', 'Andrew and Jacks guest', 'Jamies guests', 'Scores']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['07x01', '23 August 2013', 'Amy Williams', 'Edgar Davids , Jimmy Carr', '6–11']
SQL:

assistant: SELECT "First broadcast" FROM "Table" WHERE "Andrew and Jacks guest" = 'Amy Williams';