You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.

Sentence: GOP leaders submitted the new offer Tuesday afternoon in an effort to appease Democrats, whose votes are needed to avert a shutdown of federal agencies, several House and Senate aides said. Question: Who has to be appeased to keep the government open?
Solution: Democrats.
Why? The sentence says that "Democrats" have to be appeased, which answers the question.

New input: Sentence: The most important thing that Santa has to do for the reindeer is to make sure they have their coffee on Christmas Eve. 
Question: What is the most important thing Santa Claus has to do and why?
Solution:
the reindeer is to make sure they have their coffee on Christmas Eve.