Detailed Instructions: 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: USS Astrea (SP-560) was a United States Navy patrol vessel in commission from 1917 to 1919 or 1920.Astrea was built as a private motorboat of the same name by Rood and Benner in 1916. On 7 June 1917 the U.S. Navy enrolled her for use as a section patrol boat in World War I and her owner Ralph DeConta of East Boston Massachusetts delivered her to the Navy on 17 June 1917. She was commissioned as USS Astrea (SP-560) on 27 June 1917.
A:
6