Task: Question Generation
Input (English): #1 return Manco Inca Yupanqui died 
#2 return son of Manco Inca Yupanqui died 
#3 return year of #1 
#4 return year of #2 
#5 return the  difference of #4 and  #3
Output (English): How many years after  Manco Inca Yupanqui died did his son die?