How many days after the order to form a Western Frontier Force was the 2nd Battalion New Zealand Rifle Brigade sent to Dabaa?
return the  order to form a Western Frontier Force ;return the  2nd Battalion New Zealand Rifle Brigade was  sent to Dabaa ;return when  was  #1 ;return when  was  #2 ;return difference of #4 and  #3 in  days
['select', 'select', 'project', 'project', 'arithmetic']