user: Question: What was the broadcast date of the episode that visited South Africa?
Columns: ['Episode No.', 'Episode Title', 'UK Broadcast Date', 'Presenter', 'Countries Visited']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['#2.1', '"From Hong Kong to Ulaanbaatar"', '1994-01-13', 'Clive Anderson', 'Hong Kong , China, Mongolia']
SQL:

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