Question: In aerodynamics, pitch-up is a severe form of stall in an aircraft, at transonic speeds the aerodynamic loads can become so high as to break up the aircraft, as occurred in 1964 when which type of supersonic fighter-bomber, used by the United States Air Force Thunderbirds broke up in mid-air?
{'answer': 'Republic F-105 Thunderchief', 'supporting_facts': [['Pitch-up', 2], ['Republic F-105 Thunderchief', 0]]}