text: 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 staff (phone_number VARCHAR); CREATE TABLE customers (phone_number VARCHAR)
  ### Question:
  Find the phone number of all the customers and staff.
  ### Answer:
  SELECT phone_number FROM customers UNION SELECT phone_number FROM staff