user: Question: Tell me the total number of Grid for bob evans and Laps less than 68
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Niki Lauda', 'Ferrari', 70.0, '1:43:53.98', 1.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Driver" = 'bob evans' AND "Laps" < 68.0;