How many days after the Polish accepted the Soviets' amendments was the Preliminary Treaty of Peace and Armistice Conditions signed?
return the  Polish accepted the   Soviets amendments ;return the  Preliminary Treaty of Peace and  Armistice Conditions was  signed ;return when  was  #1 ;return when  was  #2 ;return difference of #4 and  #3 in  days
['select', 'select', 'project', 'project', 'arithmetic']