Task: Question Generation
Input (English): #1 return founding of Knopf publishing 
#2 return the  company acquried by Random House 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return difference of #4 and  #3 in  years
Output (English): How many years after the founding of Knopf publishing, was the company acquried by Random House?