The Douglas XO2D-1 was a prototype American observation floatplane of the 1930s. It was a single engined biplane intended to be launched by aircraft catapult from ships of the United States Navy but only one was built the production contract going to Curtiss for the SOC Seagull. 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?
Mean Of Transportation

Paul Biya (born Paul Barthélemy Biya'a bi Mvondo 13 February 1933) is a Cameroonian politician who has been the President of Cameroon since 6 November 1982. A native of Cameroon's south Biya rose rapidly as a bureaucrat under President Ahmadou Ahidjo in the 1960s serving as Secretary-General of the Presidency from 1968 to 1975 and then as Prime Minister of Cameroon from 1975 to 1982. 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?
Office Holder

Macdonald River a perennial river that is part of the Namoi catchment within the Murray–Darling basin is located in the Northern Tablelands district of New South Wales Australia. 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?
