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Charcoal burners ( " Köhler " ) built their wood piles ( " Meiler " ) in the woods and produced charcoal , which , like the products of the potash boilers - further processed " inter alia " for the glassmaking industry .
 Köhler, Meiler
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Köhler, Meiler