query: SELECT phone FROM employees WHERE first_name = "Nancy" AND last_name = "Edwards";
question: What-what For employee nancy edwards phone number?
query_toks: SELECT phone FROM employees WHERE first_name = `` Nancy '' AND last_name = `` Edwards '' ;
query_toks_no_value: select phone from employees where first_name = value and last_name = value
question_toks: What-what For employee nancy edwards phone number?