Hyphens are not valid in PHP variable names. I suggest replacing them with underscores instead, as in $new_data and $data_content . Finally, you initialize $xml but later are attempting to use the unknown variable $xml_object .
Change those to $xml .
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.