user: Question: What is the name of the circuit when Phil Hill has the fastest lap?
Columns: ['Race', 'Circuit', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Constructor', 'Tyre', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Argentine Grand Prix', 'Buenos Aires', '7 February', 'Stirling Moss', 'Stirling Moss', 'Bruce McLaren', 'Cooper - Climax', 'D', 'Report']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "Fastest lap" = 'Phil Hill';