Table schema:
CREATE TABLE Addresses (zip_postcode VARCHAR, address_id VARCHAR); CREATE TABLE Staff (staff_address_id VARCHAR, first_name VARCHAR, last_name VARCHAR)

Question: What is the zip code of staff with first name as Janessa and last name as Sawayn lived?
SQL: SELECT T1.zip_postcode FROM Addresses AS T1 JOIN Staff AS T2 ON T1.address_id = T2.staff_address_id WHERE T2.first_name = "Janessa" AND T2.last_name = "Sawayn"