user: Question: On which date was the opponent Lamine Ouahab?
Columns: ['Edition', 'Round', 'Date', 'Against', 'Surface', 'Opponent', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2004 Davis Cup Europe/Africa Group II', '1R', '9–11 April 2004', 'Tunisia', 'Hard', 'Haithem Abid', '6–4, 6–3, 7–5']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Lamine Ouahab';