Determine the topic of the question. Question: "what is vitamin b12 used for?" Topic:
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Answer: Vitamin B12

Q: Determine the topic of the question. Question: "who is the actor that plays harry potter?" Topic:
A: List of Harry Potter cast members

Question: Determine the topic of the question. Question: "what is the gdp for greenland 2010??" Topic:
Answer: Economy of Greenland

[Q]: Determine the topic of the question. Question: "what is middle class in the us?" Topic:
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[A]: American middle class

input: Please answer the following: Determine the topic of the question. Question: "What does the idea of effective nuclear charge tell us?" Topic:
++++++++++
output: Effective nuclear charge

Determine the topic of the question. Question: "what it takes aerosmith album?" Topic:
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Answer:
What It Takes (song)