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 Circulation_History (employee_name VARCHAR); CREATE TABLE Employees (employee_name VARCHAR)
### Question:
List the employees who have not showed up in any circulation history of documents. List the employee's name.
### Answer:
SELECT employee_name FROM Employees EXCEPT SELECT Employees.employee_name FROM Employees JOIN Circulation_History ON Circulation_History.employee_id = Employees.employee_id