How many months after 130 British Royal Marine Light Infantry landed in Murmansk did an assortment of British Royal Marines, French artillerymen, part of a Serb battalion, Poles, Red Russians from the Murmansk Soviet, and some Red Finns occupy the railway line from Murmansk south as far as Kem
return 130 British  Royal  Marine Light Infantry landed in  Murmansk  ;return an assortment of British  Royal  Marines ,    French artillerymen ,  part of  a Serb battalion ,   Poles ,     Red Russians from  the  Murmansk  Soviet , and  some Red  Finns occupy the railway line from Murmansk south as far as  Kem ;return month of #1 ;return month of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']