How many months after Krulak assumed duties as the commanding general, 2nd Marine Logistics Group Group/Commanding general, 6th Marine Expeditionary Brigade, Fleet Marine Force Atlantic was it before he was assigned duty as assistant deputy chief of staff for manpower and reserve affairs?
return Krulak assumed duties as the  commanding general ,  2nd Marine Logistics Group Group/Commanding general  ,   6th Marine   Expeditionary Brigade , Fleet Marine  Force Atlantic ;return Krulak was  assigned duty as assistant deputy chief of staff for manpower and  reserve affairs ;return month of #1 ;return month of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']