user: Question: What is the smallest grid with Collision as the Time/Retired for Pedro Diniz?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Gerhard Berger', 'Benetton - Renault', 45.0, '1:20:59.046', 1.0]
SQL:

assistant: SELECT MIN("Grid") FROM "Table" WHERE "Time/Retired" = 'Collision' AND "Driver" = 'Pedro Diniz';