how many winners were in round 8
CREATE TABLE table_20122 (
    "Rd" real,
    "Race" text,
    "Pole Position" text,
    "Fastest Lap" text,
    "Winning driver" text,
    "Winning team" text,
    "Report" text
)
SELECT COUNT("Winning driver") FROM table_20122 WHERE "Rd" = '8'
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 winners were in round 8 ### Input: CREATE TABLE table_20122 (
    "Rd" real,
    "Race" text,
    "Pole Position" text,
    "Fastest Lap" text,
    "Winning driver" text,
    "Winning team" text,
    "Report" text
) ### Response: SELECT COUNT("Winning driver") FROM table_20122 WHERE "Rd" = '8'