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In April 2017 , Glenda Jackson blamed the increase in TV viewers being unable to understand what actors are saying on the decline of the repertory system .
 Glenda Jackson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Glenda Jackson