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Before World War II , he played in German championships at Bad Pyrmont 1933 ( Efim Bogoljubow won ) , at Bad Aachen 1935 ( Kurt Richter won ) , and at Bad Oeynhausen 1938 ( Erich Eliskases won ) .
 Efim Bogoljubow, Kurt Richter, Erich Eliskases
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Efim Bogoljubow, Kurt Richter, Erich Eliskases