In this task, you are given a text which is the body of a document. Your job is to classify the topic of the document into these categories: 1)Company, 2)Educational Institution, 3)Artist, 4)Athlete, 5)Office Holder, 6)Mean of transportation, 7)Building, 8)Natural place, 9)Village, 10)Animal, 11)Plant, 12)Album, 13)Film, 14)Written work. Your output should be the category number. Don't generate anything apart from numbers 1-14.
Q: Text: St Martin's Cathedral (Dutch: Sint-Maartenskathedraal) also called St Martin's Church (Dutch: Sint-Maartenskerk) is a church and former cathedral in the Belgian city of Ypres. It was a cathedral and the seat of the former diocese of Ypres from 1561 to 1801 and is still commonly referred to as such. At 102 metres (335 ft) tall it is among the tallest buildings in Belgium.
A:
7