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Peter Ostroushko , Greg Brown , Jean Redpath , and Prudence Johnson , among others , were recurring guests on the program between 1974 and 1987 .
 Peter Ostroushko, Greg Brown, Jean Redpath, Prudence Johnson
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:
 Peter Ostroushko, Greg Brown, Jean Redpath, Prudence Johnson