63088
The novel has been adapted into a number of other forms , including theatre , film , television , and at least two full-length operas , by John Joubert ( 1987 – 1997 ) and Michael Berkeley ( 2000 ) .
 John Joubert, Michael Berkeley
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:
 John Joubert, Michael Berkeley