How many months after the Turks led by Umur Beg marched from Asia Minor did Ottoman forces under Umur Beg defeat Momchil's army in the battle of Peritor?
return the  Turks led by Umur  Beg marched from  Asia Minor ;return Ottoman forces under Umur  Beg did defeat Momchil 's army in  the  battle of Peritor ;return when  was  #1 ;return when  was  #2 ;return difference of #3 and  #4 in  months
['select', 'select', 'project', 'project', 'arithmetic']