user: Question: What was the Constructor for the race that had Derek Warwick as its Fastest Lap?
Columns: ['Race', 'Date', 'Location', 'Pole Position', 'Fastest Lap', 'Race Winner', 'Constructor', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Brazilian Grand Prix', '25 March', 'Jacarepaguá', 'Elio de Angelis', 'Alain Prost', 'Alain Prost', 'McLaren - TAG', 'Report']
SQL:

assistant: SELECT "Constructor" FROM "Table" WHERE "Fastest Lap" = 'Derek Warwick';