Question: What are the line 1 of addresses shared by some students and some teachers?
SQL: 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