How many more African American people were there compared to Native Americans and Pacific Islanders combined?
return African Americans ;return Native Americans ;return Pacific Islanders ;return number of  #1 ;return number of  #2 ;return number of  #3 ;return sum of #5 and  #6 ;return the  difference of #4 and  #7
['select', 'select', 'select', 'aggregate', 'aggregate', 'aggregate', 'arithmetic', 'arithmetic']