Task: Text to Code
Input (English): Step 1: For each row in Problems table, find corresponding rows in Product table and in Staff table.
Step 2: find staff_first_name, staff_last_name of the results of step 1 whose product_name not equals aut
Output (English): SELECT T2.staff_first_name , T2.staff_last_name FROM Product AS T1 JOIN Staff AS T2 JOIN Problems AS T3 ON T1.product_id = T3.product_id AND T3.closure_authorised_by_staff_id = T2.staff_id WHERE T1.product_name ! = "aut"