How many passengers did Sudan Airlines gain between 1982 and 1984?
return Sudan Airlines ;return passengers of #1 ;return #2 in  1982 ;return #2 in  1984 ;return number of  #3 ;return number of  #4 ;return the  difference of #6 and  #5
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']