I highly recommend Data Modeling for Information Professionals . You are asking about basic fundamental theory and concepts which are much better explained in a book than on a Q&A answer site like SO.
Buy an introductory book about relational databases, such as one of these.
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.