When is the earliest year in milan that guillermo vilas was champion?
CREATE TABLE table_71979 (
    "Location" text,
    "Year" real,
    "Champion" text,
    "Runner-up" text,
    "Score" text
)
SELECT MIN("Year") FROM table_71979 WHERE "Location" = 'milan' AND "Champion" = 'guillermo vilas'
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: When is the earliest year in milan that guillermo vilas was champion? ### Input: CREATE TABLE table_71979 (
    "Location" text,
    "Year" real,
    "Champion" text,
    "Runner-up" text,
    "Score" text
) ### Response: SELECT MIN("Year") FROM table_71979 WHERE "Location" = 'milan' AND "Champion" = 'guillermo vilas'