user: Question: What's the circuit that had an event cancelled?
Columns: ['Race Title', 'Circuit', 'City / State', 'Date', 'Winner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Clipsal 500', 'Adelaide Street Circuit', 'Adelaide , South Australia', '19 - 22 Mar', 'Jamie Whincup Jamie Whincup']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "Winner" = 'event cancelled';