Table schema:
CREATE TABLE department_stores (dept_store_chain_id VARCHAR); CREATE TABLE department_store_chain (dept_store_chain_id VARCHAR, dept_store_chain_name VARCHAR)

Question: How many department stores does the store chain South have?
SQL: SELECT COUNT(*) FROM department_stores AS T1 JOIN department_store_chain AS T2 ON T1.dept_store_chain_id = T2.dept_store_chain_id WHERE T2.dept_store_chain_name = "South"