question: Who drove the maserati under 18 laps with an oil leak that had a grid of under 14?
answer: SELECT driver FROM table_name_34 WHERE constructor = "maserati" AND laps < 18 AND grid < 14 AND time_retired = "oil leak"
context: CREATE TABLE table_name_34 (driver VARCHAR, time_retired VARCHAR, grid VARCHAR, constructor VARCHAR, laps VARCHAR)