How many foundeds have stade tunisien as the club, with a capacity greater than 18,000?
CREATE TABLE table_12916 (
    "Club" text,
    "City" text,
    "Founded" real,
    "Stadium" text,
    "Capacity" real
)
SELECT SUM("Founded") FROM table_12916 WHERE "Club" = 'stade tunisien' AND "Capacity" > '18,000'
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 foundeds have stade tunisien as the club, with a capacity greater than 18,000? ### Input: CREATE TABLE table_12916 (
    "Club" text,
    "City" text,
    "Founded" real,
    "Stadium" text,
    "Capacity" real
) ### Response: SELECT SUM("Founded") FROM table_12916 WHERE "Club" = 'stade tunisien' AND "Capacity" > '18,000'