Given the question: Antonov A-1 - The Antonov A-1 and related designs were a family of single-seat training gliders produced in the Soviet Union in the 1930s and 40s. All were derived from the Standard-2 (-2) (designed and flown by Oleg Konstantinovich Antonov in 1930) which in turn were derived from the Standard-1. They were produced in large numbers with around 5400 built of the U-s3 U-s4 and P-s2 major versions alone. The same design formed the basis for the Antonov A-2 and its related group of two-seat designs. 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 is:
Mean Of Transportation