Instructions: In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.
Input: Context: Merry Christmas to all. A Pagan holiday (BC) becomes a Religious holiday (AD). Which then becomes a Shopping holiday (USA). Neil deGrasse Tyson (@neiltyson) December 25, 2014 Answer: holiday shopping
Output:
what is neil degrasse tyson joking about?