Tupolev ANT-21 - The Tupolev ANT-21 was a Soviet twin-engined four-seat heavy fighter which also had the designation MI-3 (Mnogomestnyi Istebitel Multi seat fighter). It was not accepted for production only two prototypes being built. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer to this question is:
Mean Of Transportation