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In 1995 , Brendan Frey demonstrated that it was possible to train ( over two days ) a network containing six fully connected layers and several hundred hidden units using the wake-sleep algorithm , co-developed with Peter Dayan and Hinton .
 Brendan Frey, Peter Dayan, Hinton
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:
 Brendan Frey, Peter Dayan, Hinton