Teacher:Given a text, write a compressed version of it in a single sentence.
Teacher: Now, understand the problem? Solve this instance: Next to the castle is the impressive Gothic Se Velha (Old Cathedral) of Silves, built by the liberating Crusaders, some of whom are buried within, in the 13th century. The remains of a Moorish mosque are hidden behind the altar.
Student:
Next to the castle is the Old Cathedral, built by Crusaders who are buried within. Moorish mosque remains are there.