Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_16730 ( "Rnd" real, "Race" text, "Date" text, "Location" text, "Pole Position" text, "Fastest Lap" text, "Race Winner" text, "Constructor" text, "Report" text )

### Question ###
How many races had the pole position Alain Prost and the race winner Keke Rosberg?

### Accurate SQL ###

SELECT COUNT("Race") FROM table_16730 WHERE "Pole Position" = 'Alain Prost' AND "Race Winner" = 'Keke Rosberg'