Heres an alternative that doesn't rely on unique items in column A being consecutive.
If I'm understanding correctly, you want a count of unique entries in column 'A' where column 'I' equals 3.
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.