user: ### NOW ANSWER:
Question: who is the constructor when the grid is more than 23 and the driver is Piercarlo Ghinzani?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Nigel Mansell', 'Williams - Honda', 75.0, '1:30:38.471', 2.0]
SQL:

assistant: SELECT "Constructor" FROM "Table" WHERE "Grid" > 23.0 AND "Driver" = 'Piercarlo Ghinzani';