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First proposed by Thomas Henry Huxley in 1880 , it is a slightly more inclusive group than the marsupials ; it contains all marsupials as well as many extinct non-marsupial relatives .
 Thomas Henry Huxley
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:
 Thomas Henry Huxley