user: Question: What was the UK broadcast date for the episode which visited USA?
Columns: ['Episode No.', 'Episode Title', 'UK Broadcast Date', 'Presenter', 'Details of Journey', 'Countries Visited']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['#1.1', '"Coast to Coast"', '1980-10-30', 'Ludovic Kennedy', 'New York to Los Angeles', 'USA']
SQL:

assistant: SELECT "UK Broadcast Date" FROM "Table" WHERE "Countries Visited" = 'USA';