Finally solved this. To call a service operation on a data service class you need to use data service context object's CreateQuery or Execute methods. For example.
(this answer is incorrect (see comments), but is deliberately left here to stop other answers stumbling blindly into the same hole).
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.