1535
Like other litopterns , it is not closely related to any living mammal , being most closely related to the group containing horses , rhinos and tapirs ( the Perissodactyla ) , from which litopterns diverged approximately 66 million years ago .
 location: Perissodactyla
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Perissodactyla