The Customers table provides input to the Name and Address Operator, which stores its output in the CLN_CUSTOMERS table. The CLN_CUSTOMERS table provides FIRST, LAST, and ADDRESS input to the Match-Merge Operator. The Match-Merge operator provides FIRST, LAST, and ADDRESS input to the MM_CUSTOMERS table. It provides FIRST, LAST, ADDRESS, MM_FIRST, MM_LAST, and MM_ADDRESS input to the REF_TABLE table.