The problem is that the alias names is not yet available when the WHERE clause is evaluated. The problem should be solved by moving the subqueries from the SELECT clause into JOIN clauses like this.
Trying to avoid subqueries may be the 'real' solution (it may be possible to join tables and GROUP BY results).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.