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