user: Question: How many grids for heinz-harald frentzen with 61 laps?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Ralf Schumacher', 'Williams - BMW', 62.0, '1:30:44.817', 3.0]
SQL:

assistant: SELECT COUNT("Grid") FROM "Table" WHERE "Laps" = 61.0 AND "Driver" = 'heinz-harald frentzen';