user: Question: what date was Mallala Motor Sport Park the circuit?
Columns: ['Circuit', 'Location / State', 'Date', 'Winning driver', 'Team']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Amaroo Park', 'Sydney , New South Wales', '26 - 28 Feb', 'Peter Doulman', 'M3 Motorsport']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Circuit" = 'Mallala Motor Sport Park';