SELECT T2.email_address FROM Addresses AS T1 JOIN Teachers AS T2 ON T1.address_id = T2.address_id WHERE T1.zip_postcode = "918"
What are the email addresses of teachers whose address has zip code '918'?
CREATE TABLE Addresses (
    address_id VARCHAR,
    zip_postcode VARCHAR
)

CREATE TABLE Teachers (
    email_address VARCHAR,
    address_id VARCHAR
)