Task: Text to Code
Input (English): Step 1: For each row in Band table, find the corresponding rows in Vocals table.
Step 2: find Type of the results of step 1 whose Lastname equals Heilo
Output (English): SELECT T2.Type FROM Band AS T1 JOIN Vocals AS T2 ON T1.Id = T2.Bandmate WHERE T1.Lastname = "Heilo"