user: Question: What circuit did Emilio de Villota win on at the Pace Petroleum Trophy?
Columns: ['Round', 'Name', 'Circuit', 'Date', 'Winning driver', 'Winning car']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'International Gold Cup', 'Oulton Park', 'April 4', 'Guy Edwards', 'Arrows A1']
SQL:

assistant: SELECT "Circuit" FROM "Table" WHERE "Winning driver" = 'Emilio de Villota' AND "Name" = 'Pace Petroleum Trophy';