What is title of album which track Balls to the Wall belongs to?
SELECT T1.title FROM albums AS T1 JOIN tracks AS T2 ON T1.id = T2.genre_id WHERE T2.name = "Balls to the Wall";
title of album which track belongs to refers to joining albums and tracks tables on a common key; track name = 'Balls to the Wall' refers to WHERE T2.name = 'Balls to the Wall';