Problem: Given the question: Determine the topic of the question. Question: "what is Carbon 14 dating is a type of ??" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Carbon-14

Problem: Given the question: Determine the topic of the question. Question: "what war led to Pearl Harbor?" Topic:
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The answer is:
Events leading to the attack on Pearl Harbor

Problem: Given the question: Determine the topic of the question. Question: "What is caused by the human immunodeficiency virus??" Topic:
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The answer is:
HIV