Definition: 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: Today we welcomed a beautiful baby daughter into the world. Both she and her mother are doing great. We can't stop smiling. Thank you Harry for stepping in to host the show at 2 and a half hours notice! x x x James Corden (@JKCorden) December 13, 2017 Answer: harry
Output:
who stepped up to help james host the show?