CREATE TABLE Employees (employee_name VARCHAR2, employee_id VARCHAR2)
CREATE TABLE Documents_to_be_destroyed (Destruction_Authorised_by_Employee_ID VARCHAR2, Destroyed_by_Employee_ID VARCHAR2)

What are the names of the employees who authorised the destruction and the employees who destroyed the corresponding documents?
SELECT T2.employee_name, T3.employee_name FROM Documents_to_be_destroyed AS T1 JOIN Employees AS T2 ON T1.Destruction_Authorised_by_Employee_ID = T2.employee_id JOIN Employees AS T3 ON T1.Destroyed_by_Employee_ID = T3.employee_id
SELECT "T2"."employee_name", "T3"."employee_name" FROM "Documents_to_be_destroyed" "T1" JOIN "Employees" "T2" ON "T1"."Destruction_Authorised_by_Employee_ID" = "T2"."employee_id" JOIN "Employees" "T3" ON "T1"."Destroyed_by_Employee_ID" = "T3"."employee_id"