How many won the prize when Regina was the runner-up?
CREATE TABLE table_21940 (
    "Season" text,
    "The Mole" text,
    "Winner" text,
    "Runner-up" text,
    "International destination" text
)
SELECT COUNT("Winner") FROM table_21940 WHERE "Runner-up" = 'Regina'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many won the prize when Regina was the runner-up? ### Input: CREATE TABLE table_21940 (
    "Season" text,
    "The Mole" text,
    "Winner" text,
    "Runner-up" text,
    "International destination" text
) ### Response: SELECT COUNT("Winner") FROM table_21940 WHERE "Runner-up" = 'Regina'