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Mariza Koch ( Greek : Μαρίζα Κωχ ) is a Greek folk music singer who has recorded many albums since starting her career in 1971 .
 Mariza Koch, Greek
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mariza Koch, Greek