You need to select more than one property in your Union; The current result is IEnumerable (assuming your filename is a string).
You should be able to select from your first query instead of the image table again. Something like.
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.