In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.

Context: Castle Hill or Noow Tlein in Sitka Alaska is a National Historic Landmark and the historical site of Tlingit and Russian forts. Castle Hill is the area of land understood by the Tlingit people to be ceded to the Russian government following the battle of 1804. It is also the location where in 1867 the Russian flag was lowered and the American flag was raised marking the transfer of Alaska to the United States. In 1959 after Alaska was admitted as the 49th U.S.
Question: The document can be classified to which topic?
Options: 1)Film, 2)Animal, 3)EducationalInstitution, 4)Building, 5)Artist
4