user: ### NOW ANSWER:
Question: When is the French Open when Serena Williams is the player?
Columns: ['#', 'Player', 'Age', 'Australian Open', 'French Open', 'Wimbledon', 'US Open']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Maureen Connolly Brinker', '18 years 254 days', 1953.0, 1953.0, 1952.0, 1951.0]
SQL:

assistant: SELECT MIN("French Open") FROM "Table" WHERE "Player" = 'Serena Williams';