After Googling around for examples of XPath expressions in WPF, I found this article that gave me my solution in a round-about way. His example was more complicated than mine, so I didn't have to go creating XML converter classes. I just needed the following XAML for my dependent Component ComboBox.
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.