user: Question: Who drove the Maserati under 18 laps with an Oil leak that had a grid of under 14?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Stirling Moss', 'Vanwall', 18.0, '2:59:22.7', 2.0]
SQL:

assistant: SELECT "Driver" FROM "Table" WHERE "Constructor" = 'Maserati' AND "Laps" < 18.0 AND "Grid" < 14.0 AND "Time/Retired" = 'Oil leak';