user: Question: Tell me the lowest Grid for engine and driver of emerson fittipaldi with more laps than 70
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Niki Lauda', 'Ferrari', 78.0, '1:42:18.4', 2.0]
SQL:

assistant: SELECT MIN("Grid") FROM "Table" WHERE "Time/Retired" = 'engine' AND "Driver" = 'emerson fittipaldi' AND "Laps" > 70.0;