Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_28436909_4 (organization VARCHAR, founding_date VARCHAR)
### Question:
When 1873-12-25 is the founding date how many organizations are there?
### Answer:
SELECT COUNT(organization) FROM table_28436909_4 WHERE founding_date = "1873-12-25"