CREATE TABLE table_73882 ("Round" FLOAT, "Circuit" TEXT, "Date" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Winning driver" TEXT, "Winning team" TEXT)

What is every pole position for the Castle Combe circuit and Robbie Kerr is the winning driver?
SELECT "Pole Position" FROM table_73882 WHERE "Circuit" = 'Castle Combe' AND "Winning driver" = 'Robbie Kerr'
SELECT "Pole Position" FROM "table_73882" WHERE "Circuit" = 'Castle Combe' AND "Winning driver" = 'Robbie Kerr'