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John Frederick Cammerhoff ( 28 July 1721 , Hillersleben , Germany - 28 April 1751 ) was a Moravian bishop and missionary .
 Hillersleben, Germany
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hillersleben, Germany