user: Question: What was the first year that had a prize of 50,000?
Columns: ['Country', 'Name', 'Host', 'Channel', 'Prize', 'First year aired']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Horrid Henry', 'The Celebrity Chair', 'Shamar Stewart', 'CITV', '50 000', 'August 3 - November 23, 2002']
SQL:

assistant: SELECT "First year aired" FROM "Table" WHERE "Prize" = '50,000';