Answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. RWD 17 -  The RWD 17 was a Polish aerobatics-trainer aircraft of 1937 parasol wing monoplane constructed by the RWD team.
Answer:
Mean Of Transportation