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Alfred Ritscher ( 23 May 1879 in Bad Lauterberg - 30 March 1963 in Hamburg ) was a German polar explorer .
 Alfred Ritscher, Bad Lauterberg, Hamburg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alfred Ritscher, Bad Lauterberg, Hamburg