Task: Text to Code
Input (English): Step 1: For each row in CMI_Cross_References table, find corresponding rows in Customer_Master_Index table and in Parking_Fines table.
Step 2: find council_tax_id of the results of step 1 whose cmi_details equals Schmitt-Lang.
Step 3: find council_tax_id of the results of step 1 whose cmi_details equals Schmidt ,  Kertzmann and Lubowitz.
Step 4: show the rows that are in the results of step 2 but not in the results of step 3
Output (English): SELECT T3.council_tax_id FROM Customer_Master_Index AS T1 JOIN CMI_Cross_References AS T2 ON T1.master_customer_id = T2.master_customer_id JOIN Parking_Fines AS T3 ON T2.cmi_cross_ref_id = T3.cmi_cross_ref_id WHERE T1.cmi_details = "Schmitt-Lang" EXCEPT SELECT T3.council_tax_id FROM Customer_Master_Index AS T1 JOIN CMI_Cross_References AS T2 ON T1.master_customer_id = T2.master_customer_id JOIN Parking_Fines AS T3 ON T2.cmi_cross_ref_id = T3.cmi_cross_ref_id WHERE T1.cmi_details = "Schmidt ,  Kertzmann and Lubowitz"