With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: In September 1937 the Spitfire prototype, "K5054," was fitted with ejector type exhausts. Later marks of the Spitfire used a variation of this exhaust system fitted with forward-facing intake ducts to distribute hot air out to the wing-mounted guns to prevent freezing and stoppages at high altitudes, replacing an earlier system that used heated air from the engine coolant radiator. The latter system had become ineffective due to improvements to the Merlin itself which allowed higher operating altitudes where air temperatures are lower. Ejector exhausts were also fitted to other Merlin-powered aircraft.
text_B: Was the Nazi regime offended by the presence of Jewish athletes from other countries?
DON'T KNOW.