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_Department_Assignments (staff_id VARCHAR); CREATE TABLE staff (staff_id VARCHAR, staff_name VARCHAR)
### Question:
Find the id and name of the staff who has been assigned for the shortest period.
### Answer:
SELECT T1.staff_id, T1.staff_name FROM staff AS T1 JOIN Staff_Department_Assignments AS T2 ON T1.staff_id = T2.staff_id ORDER BY date_assigned_to - date_assigned_from LIMIT 1