Task: Question Generation
Input (English): #1 return the  slave trade was  ended in  the Ddanish West Indies 
#2 return the  slaves were finally emancipated 
#3 return year of #1 
#4 return year of #2 
#5 return the  difference of #4 and  #3
Output (English): How many years after the slave trade was ended in teh Ddanish West Indies were the slaves finally emancipated?