Task: Question Answering
Input (English): Context : Yuchi Chifan (Chinese: 尉遲熾繁) or Yuchi Fanchi (Chinese: 尉遲繁熾) (566--595), later Buddhist nun name Huashou (華首), was a concubine of Emperor Xuan of Northern Zhou, an emperor of the Chinese/Xianbei dynasty Northern Zhou. 
Question : What is Yuchi Chifan's spouse's name?
Output (English): Emperor Xuan of Northern Zhou