Context: CREATE TABLE Teachers (address_id VARCHAR); CREATE TABLE Students (address_id VARCHAR); CREATE TABLE Addresses (line_1 VARCHAR, address_id VARCHAR)
Question: What are the line 1 of addresses shared by some students and some teachers?
Answer: 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