Quantos Grandes Prêmios ganhou o construtor Benetton - Ford e a pole position foi Michael Schumacher?
CREATE TABLE table_1137702_3 (grand_prix VARCHAR, winning_constructor VARCHAR, pole_position VARCHAR)
SELECT COUNT(grand_prix) FROM table_1137702_3 WHERE winning_constructor = "Benetton - Ford" AND pole_position = "Michael Schumacher"