Task: Text to Code
Input (English): Step 1: For each row in Band table, find the corresponding rows in Performance table.
Step 2: find the number of rows of each value of StagePosition in the results of step 1.
Step 3: find Lastname of step 1 results with largest value in the results of step 2
Output (English): SELECT T1.Lastname FROM Band AS T1 JOIN Performance AS T2 ON T1.Id = T2.Bandmate GROUP BY T2.StagePosition ORDER BY Count ( * ) Desc LIMIT 1