user: Question: On what day did Tommy Ellis drive?
Columns: ['Year', 'Date', 'Driver', 'Team', 'Manufacturer', 'Laps', 'Miles (km)', 'Race Time', 'Average Speed (mph)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1990.0, 'July 15', 'Tommy Ellis', 'John Jackson', 'Buick', '300', '317.4 (510.805)', '3:41:58', '85.797']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Driver" = 'Tommy Ellis';