query: SELECT avg(Order_Quantity) FROM Invoices WHERE payment_method_code  =  "MasterCard"
question: Check invoice record and compute the average quantity ordered payment method "MasterCard".
query_toks: SELECT avg ( Order_Quantity ) FROM Invoices WHERE payment_method_code = `` MasterCard ''
query_toks_no_value: select avg ( order_quantity ) from invoices where payment_method_code = value
question_toks: Check invoice record and compute the average quantity ordered payment method "MasterCard".