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.
One example: concept: Selena Gomez question: what city was selena gomez born in?
Solution is here: New York City
Explanation: The answer is correct based on the information available on the web about Selena Gomez.

Now, solve this: concept: Battle Of Antietam  question:  in what state did the bloody battle of antietam take place?
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
['Sharpsburg']