user: Question: What circuit had 16 rounds?
Columns: ['Round', 'Race Title', 'Grand Prix', 'Circuit', 'Date']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, "Foster's Australian Grand Prix", 'Australian GP', 'Albert Park , Melbourne', '7 March']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "Round" = 16.0;