Task: Question Generation
Input (English): #1 return negotiations of the  treaty 
#2 return the  entire island of Ireland would become a self-governing Dominion known as the   Irish Free State 
#3 return year of #1 
#4 return year of #2 
#5 return the  difference of #4 and  #3
Output (English): According to the treaty, how many years after negotiation would the entire island of Ireland become a self-governing Dominion known as the Irish Free State?