When 1873-12-25 is the founding date how many organizations are there?
CREATE TABLE table_28436909_4 (
    organization VARCHAR,
    founding_date VARCHAR
)
SELECT COUNT(organization) FROM table_28436909_4 WHERE founding_date = "1873-12-25"
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 1873-12-25 is the founding date how many organizations are there? ### Input: CREATE TABLE table_28436909_4 (
    organization VARCHAR,
    founding_date VARCHAR
) ### Response: SELECT COUNT(organization) FROM table_28436909_4 WHERE founding_date = "1873-12-25"