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The photo shows the performers who played the two main couples in the series , from left to write : Ma Ju - feng , Chang Chiung - tsu , Chin Su - mei , and Liu Teh - kai .
 Ma Ju - feng, Chang Chiung - tsu, Chin Su - mei, Liu Teh - kai
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Ma Ju - feng, Chang Chiung - tsu, Chin Su - mei, Liu Teh - kai