I was reading a bang-bang shootem up entitled "traitor's kiss" by Gerald Seymour. At the beginning of each of twenty chapters he asks a question, the answer to which is Kaliningrad. This is the question for chapter 5.

"Q. What is the birthplace of Max Coplet, the Jewish composer who wrote 'Where Have All The Flowers Gone' for Marlene Deitrich?
A. Kaliningrad."

Does anyone have the history of this song?