Please answer the following question: Roi-Namur /r-nmr/ is an island in the north part of the Kwajalein atoll in the Marshall Islands. Germany annexed the Marshalls in 1885 but did not put government officials on the islands until 1906 leaving island affairs to a group of powerful German trading companies. Japan took over in 1914 and colonised the Marshalls extensively developing and fortifying large bases on many of the islands.Roi-Namur was the target of the U.S. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Building