user: Question: What is the low grid for gerhard berger for laps over 56?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Damon Hill', 'Williams - Renault', 72.0, '1:54:55.322', 1.0]
SQL:

assistant: SELECT MIN("Grid") FROM "Table" WHERE "Driver" = 'gerhard berger' AND "Laps" > 56.0;