72700
Evolution It is speculated that during the Eocene period , hoofed marsh dwellers carried their body weight mainly on two of the middle toes , which grew to equal size , becoming the Artiodactyla or even-toed hoofed animals .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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