Task: Text Categorization
Input (English): Context: The Yakovlev Yak-19 was a prototype Soviet fighter aircraft built in 1947. It was the second Yakovlev jet fighter after the Yak-15 and the first OKB aircraft designed from the onset to have an all-metal stressed skin and a hydraulic system. The Yak-19 was the second Soviet aircraft to use an afterburning turbojet the Klimov RD-10F and the last Yakovlev Aircraft to use a version of the German Jumo 004-derived RD-10 jet engine. Only two examples were built. USAF/DoD reporting name - Type 7.
Question: The document can be classified to which topic? 
Options: 1)NaturalPlace, 2)Album, 3)Film, 4)EducationalInstitution, 5)MeanOfTransportation
Output (English): 5