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 department_stores (dept_store_chain_id VARCHAR)
### Question:
What are the ids of the two department store chains with the largest number of department stores?
### Answer:
SELECT dept_store_chain_id FROM department_stores GROUP BY dept_store_chain_id ORDER BY COUNT(*) DESC LIMIT 2