user: Question: What day did Emerson Fittipaldi win the Spanish Grand Prix?
Columns: ['Race', 'Circuit', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Constructor', 'Tyre', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Argentine Grand Prix', 'Buenos Aires', '23 January', 'Carlos Reutemann', 'Jackie Stewart', 'Jackie Stewart', 'Tyrrell - Ford', 'G', 'Report']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Winning driver" = 'Emerson Fittipaldi' AND "Race" = 'Spanish Grand Prix';