Which happened first, Ottomoan observation posts being removed or Paha retreating to the Inhul River?
return Ottomoan observation posts being removed ;return Paha retreating to the  Inhul River ;return when  was  #1 ;return when  was  #2 ;return which is lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']