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Some relict species of vertebrates are Caucasian parsley frog , Caucasian salamander , Robert 's snow vole , and Caucasian grouse , and there are almost entirely endemic groups of animals such as lizards of genus " Darevskia " .
 Caucasian, Robert, Caucasian, Darevskia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Caucasian, Robert, Caucasian, Darevskia