Task: Text to Code
Input (English): Step 1: For each row in employees table, find the corresponding rows in customers table.
Step 2: find employees's first_name of the results of step 1 whose customers's first_name equals Nancy and customers's last_name equals Edwards
Output (English): SELECT T1.first_name FROM employees AS T1 JOIN customers AS T2 ON T1.id = T2.support_rep_id WHERE T2.first_name = "Nancy" AND T2.last_name = "Edwards"