user: Question: What are the average laps for Jackie Stewart?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Dan Gurney', 'Eagle - Weslake', 28.0, '1:40:49.4', 2.0]
SQL:

assistant: SELECT AVG("Laps") FROM "Table" WHERE "Driver" = 'Jackie Stewart';