Based on the given question and tppic, give an answer. The answer is available on on the internet. The questions are mostly centered around a single named entity.
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Question: concept: Denver question: what airport does southwest fly to in denver?

Answer: ['Front Range Airport', 'Centennial Airport', 'Denver International Airport', 'Rocky Mountain Metropolitan Airport']

Question: concept: North Korea question: what government type is north korea?

Answer: ['Juche']

Question: concept: Albert Einstein question: what did einstein invent?

Answer:
Einstein refrigerator