You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
One example: Category: WHO'S BUYING? 
Clue: YouTube, in 2006
Solution is here: google
Explanation: Google acquired, i.e. bought, YouTube in 2006 for $1.65 billion.

Now, solve this: Category: HITHER & YON 
Clue: Small numbers of reindeer imported to Alaska from this Russian region eventually increased to more than 500,000
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
siberia