user: ### NOW ANSWER:
Question: Which Laps have a Time/Retired of + 4 laps, and a Grid larger than 18?
Columns: ['Driver', 'Team', 'Laps', 'Time/Retired', 'Grid', 'Points']
Types: ['text', 'text', 'real', 'text', 'real', 'real']
Sample row: ['Adrian Fernández', 'Fernández Racing', 100.0, '1:56:16.626', 3.0, 20.0]
SQL:

assistant: SELECT AVG("Laps") FROM "Table" WHERE "Time/Retired" = '+ 4 laps' AND "Grid" > 18.0;