user: Question: What is the top grid that is driven by Martin Brundle?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Alain Prost', 'Williams - Renault', 45.0, '1:18:40.885', 1.0]
SQL:

assistant: SELECT "Grid" FROM "Table" WHERE "Driver" = 'Martin Brundle';