query: SELECT customer_email ,  customer_name FROM customers WHERE payment_method  =  'Visa'
question: List the names and emails of customers who payed by Visa card.
query_toks: SELECT customer_email , customer_name FROM customers WHERE payment_method = 'Visa '
query_toks_no_value: select customer_email , customer_name from customers where payment_method = value
question_toks: List the names and emails of customers who payed by Visa card.