user: Question: How many races had the pole position Alain Prost and the race winner Keke Rosberg?
Columns: ['Rnd', 'Race', 'Date', 'Location', 'Pole Position', 'Fastest Lap', 'Race Winner', 'Constructor', 'Report']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'South African Grand Prix', '23 January', 'Kyalami', 'René Arnoux', 'Alain Prost', 'Alain Prost', 'Renault', 'Report']
SQL:

assistant: SELECT COUNT("Race") FROM "Table" WHERE "Pole Position" = 'Alain Prost' AND "Race Winner" = 'Keke Rosberg';