user: Question: Name the number of constr with the first win at the 1978 Brazilian Grand Prix
Columns: ['Pos', 'Manufacturer', 'Seasons', 'Starts', 'Wins', 'Sole supplier', 'First win', 'Last win', 'Drivers', 'Constr.']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Goodyear', '1959 – 1998', 494.0, 368.0, 113.0, '1965 Mexican Grand Prix', '1998 Italian Grand Prix', 24.0, 26.0]
SQL:

assistant: SELECT COUNT("Constr.") FROM "Table" WHERE "First win" = '1978 Brazilian Grand Prix';