CREATE TABLE management (department_id DECIMAL, head_id DECIMAL, temporary_acting TEXT)
CREATE TABLE department (department_id DECIMAL, name TEXT, creation TEXT, ranking DECIMAL, budget_in_billions DECIMAL, num_employees DECIMAL)
CREATE TABLE head (head_id DECIMAL, name TEXT, born_state TEXT, age DECIMAL)

How many heads of the departments are older than 56 ?
SELECT COUNT(*) FROM head WHERE age > 56
SELECT COUNT(*) FROM "head" WHERE "age" > 56