user: Question: What is karl wendlinger's total grid #?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Damon Hill', 'Williams - Renault', 53.0, '1:17:07.509', 2.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Driver" = 'karl wendlinger';