How many years passed between the first and second coups in Paraguay after the 1904 revolution?
return the  first coup in  Paraguay after the 1904 revolution ;return the  second coup in  Paraguay after the 1904 revolution ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']