How many days before the end of the negotiating of the Anglo-Irish Treaty was a decision taken to recommend the treaty to Dáil Éireann?
return the  end of the   negotiating of  the    Anglo-Irish treaty ;return a decision was  taken to recommend the  treaty to  Dáil Éireann ;return when  was  #1 ;return when  was  #2 ;return difference of #3 and  #4 in  days
['select', 'select', 'project', 'project', 'arithmetic']