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His studio was reminiscent of the houses of the peasants from his native region : there was a big slab of rock as a table and a primitive fireplace , similar to those found in traditional houses in his native Oltenia , while the rest of the furniture was made by him out of wood .
 Oltenia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Oltenia