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As Emperor Wenzong had succeeded his older brother Emperor Jingzong after Emperor Jingzong 's death , his mourning text for Emperor Jingzong originally referred to himself as , " your filially pious younger brother . "
 Emperor Wenzong, Emperor Jingzong, Emperor Jingzong, Emperor Jingzong
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Emperor Wenzong, Emperor Jingzong, Emperor Jingzong, Emperor Jingzong