When did the staff member with first name as Janessa and last name as Sawayn leave the company?
SELECT date_left_staff FROM Staff WHERE first_name = "Janessa" AND last_name = "Sawayn";
SELECT date_left_staff FROM Staff WHERE first_name = "Janessa" AND last_name = "Sawayn";
[{'date_left_staff': '2018-03-23 22:53:12'}]