user: Question: When was the Prijedor tournament?
Columns: ['Date', 'Tournament', 'Surface', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['June 26, 2006', 'Belgrade', 'Clay', 'Ilia Kushev', '6–4, 6–1']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Tournament" = 'Prijedor';