query: SELECT date_became_customer FROM Customers WHERE first_name = "Carole" AND last_name = "Bernhard";
question: When did Carole Bernhard first become a customer?
query_toks: SELECT date_became_customer FROM Customers WHERE first_name = `` Carole '' AND last_name = `` Bernhard '' ;
query_toks_no_value: select date_became_customer from customers where first_name = value and last_name = value
question_toks: When did Carole Bernhard first become a customer?