SELECT T1.line_1 FROM Addresses AS T1 JOIN Students AS T2 ON T1.address_id = T2.address_id INTERSECT SELECT T1.line_1 FROM Addresses AS T1 JOIN Teachers AS T2 ON T1.address_id = T2.address_id
What are the line 1 of addresses shared by some students and some teachers?
CREATE TABLE Teachers (
    address_id VARCHAR
)

CREATE TABLE Students (
    address_id VARCHAR
)

CREATE TABLE Addresses (
    line_1 VARCHAR,
    address_id VARCHAR
)