How many more million people died in the 1918 flu pandemic compared to how many million Russians contracted malaria in 1923?
return 1918 flu pandemic ;return people that died in  #1 ;return Russians ;return #3 that contracted malaria ;return #4 in  1923 ;return number of  #2 ;return number of  #5 ;return difference of #6 and  #7 ;return division of #8 and  one million
['select', 'project', 'select', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic', 'project']