Task: Text to Code
Input (English): Step 1: For each row in bank table, find corresponding rows in customer table and in loan table.
Step 2: find cust_name of the results of step 1 with largest value of amount
Output (English): SELECT T2.cust_name FROM bank AS T1 JOIN customer AS T2 ON T2.branch_ID = T1.branch_ID JOIN loan AS T3 ON T1.branch_ID = T3.branch_ID ORDER BY T3.amount Desc LIMIT 1