Detailed 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.
Problem:Context: It's been a long time coming but I always felt this day would come. #ConfederateFlag #ItsComingDown James E. Clyburn (@Clyburn) July 9, 2015 Answer: a long time
Solution:
how long has it been coming?