Is it possible to trace back a string inside an IPA binary?

Yes, it's likely. An IPA is just a zip file. You can extract it to get the application binary.

You can usually run strings over an application binary to see string literals.

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.