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Leo " The Lion " Mathisen ( 10 October 1906 – 16 December 1969 ) was a Danish jazz pianist , composer , arranger , singer and bandleader .
 Leo, Mathisen, Danish
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Leo, Mathisen, Danish