user: Question: How many average points did the team minardi team usa have when there was a grid 3 and more laps than 68?
Columns: ['Driver', 'Team', 'Laps', 'Time/Retired', 'Grid', 'Points']
Types: ['text', 'text', 'real', 'text', 'real', 'real']
Sample row: ['Will Power', 'Team Australia', 68.0, '1:45:13.637', 1.0, 34.0]
SQL:

assistant: SELECT AVG("Points") FROM "Table" WHERE "Team" = 'minardi team usa' AND "Grid" = 3.0 AND "Laps" > 68.0;