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He was educated at the noted Mommsen-Gymnasium in Berlin and from 1928 onwards at Schule Schloss Salem , a famously spartan boarding school that exposed the scions of rich and powerful families to a life devoid of privilege .
 Mommsen-Gymnasium, Berlin, Schule Schloss Salem
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mommsen-Gymnasium, Berlin, Schule Schloss Salem