How many different dates are there for founded teams for the venue of champion window field?
CREATE TABLE table_name_77 (
    founded VARCHAR,
    venue VARCHAR
)
SELECT COUNT(founded) FROM table_name_77 WHERE venue = "champion window field"
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 different dates are there for founded teams for the venue of champion window field? ### Input: CREATE TABLE table_name_77 (
    founded VARCHAR,
    venue VARCHAR
) ### Response: SELECT COUNT(founded) FROM table_name_77 WHERE venue = "champion window field"