How many white immigrants, from 1770-1775, were Scots and Scots-Irish?
return white immigrants from  1770-1775 ;return #1 that were Scots ;return #1 that were Scots-Irish ;return number of  #2 ;return number of  #3 ;return sum of #4 and  #5
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']