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Han Bong-Soo ( August 25 , 1933 – January 8 , 2007 ) , also known as Bong Soo Han , was a martial arts instructor , author , the founder of the International Hapkido Federation , and one of the foremost practitioners of hapkido through his participation in books , magazine articles , and popular films featuring this Korean martial art .
 Han, Han
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Han, Han