user: Question: What was the circuit had a race on September 20.
Columns: ['Race', 'Class(es)', 'Length/Duration', 'Circuit', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Rolex 24 At Daytona', 'DP/GT', '24 Hours', 'Daytona International Speedway', 'January 26 January 27']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "Date" = 'September 20';