Problem: Given the question: R-33 was the armament of which supersonic aircraft?
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The answer is:
Mikoyan MiG-31

Problem: Given the question: Which genus contains more species, Mussaenda or Corynocarpus?
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The answer is:
Mussaenda

Problem: Given the question: What type of instrument did Vladimir Oidupaa play
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The answer is:
accordion