Question: What's the date of the circuit Winton Motor Raceway?
SQL: SELECT "Date" FROM "2-18961926-1" WHERE "Circuit" = 'Winton Motor Raceway';

Question: What's the city/state of Hidden Valley Raceway?
SQL: SELECT "City / State" FROM "2-18961926-1" WHERE "Circuit" = 'Hidden Valley Raceway';

Question: What's the date of Bahrain International Circuit?
SQL: SELECT "Date" FROM "2-18961926-1" WHERE "Circuit" = 'Bahrain International Circuit';

Question: What's the circuit that had an event cancelled?
SQL: SELECT "Circuit" FROM "2-18961926-1" WHERE "Winner" = 'event cancelled';