Instructions: In this task, you are given a context paragraph of the tweet and question. Your task is to generate right answer of given question based on given context tweet paragraph.
Input: Context: Very sorry to say that I have to pull out today. Very disappointed and I am obviously very sorry for any fans... Kei Nishikori (@keinishikori) March 28, 2014 Question: who had to pull out
Output:
kei nishikori