The best I could figure out with my google-fu is I believe node type 8 is referring to comments. Seeing what you're feeding tidy_repair_string() that's making it fail would help.
I also googled this issue without viewing anomareh's answer, and came to the same conclusion. Tidy's nody type should use the same integers as the DOM node type inteegers. 8 stands for comment.
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.