You have access to a number of variables in the computed field. It tells you right there where you create it - see the help text below the text area where you type in your PHP? Also, where is $under coming from?
If it's not hard coded, you'd have to change this code a little, but here's the gist.
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.