user: Question: What is the grid total for Bruce McLaren with over 73 laps?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Jack Brabham', 'Brabham - Repco', 80.0, '2:13:13.4', 1.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Laps" > 73.0 AND "Driver" = 'Bruce McLaren';