Task: Text to Code
Input (English): SQL: SELECT Name , Count ( * ) FROM singer GROUP BY Name
Feedback: Make sure to find number of similar rows for all  singer in concert's singer id.
Output (English): SELECT T2.name ,  count(*) FROM singer_in_concert AS T1 JOIN singer AS T2 ON T1.singer_id  =  T2.singer_id GROUP BY T2.singer_id