What was the winning score when there were 9 strokes advantage?
CREATE TABLE table_74728 (
    "Date" text,
    "Tournament" text,
    "Winning score" text,
    "Margin of victory" text,
    "Runner(s)-up" text
)
SELECT "Winning score" FROM table_74728 WHERE "Margin of victory" = '9 strokes'
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: What was the winning score when there were 9 strokes advantage? ### Input: CREATE TABLE table_74728 (
    "Date" text,
    "Tournament" text,
    "Winning score" text,
    "Margin of victory" text,
    "Runner(s)-up" text
) ### Response: SELECT "Winning score" FROM table_74728 WHERE "Margin of victory" = '9 strokes'