Edited: now working. Test it here (but in MSSQL).
The problem isn't the SQL; you're asking for records with a groupid between 2 & 3 in the first section, AND between 14 and 21 in the second. No record can match that criteria.
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.