How many total mandatory delegates were proposed by both the Bolshevik Central Committee and the Socialist Revolutionaries?
return the  Bolshevik Central Committee ;return the  Socialist Revolutionaries ;return mandatory delegates proposed by #1 ;return mandatory delegates proposed by #2 ;return number of  #3 ;return number of  #4 ;return sum of #5 and  #6
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']