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Cynarctoides acridens is an extinct species of Cynarctoides , belonging to the subfamily Borophaginae and tribe Phlaocyonini , a canine which inhabited most of west central North America from the Miocene epoch ( Harrisonian stage to Early Barstovian stages ) living 24.8 — 13.6 mya and existed for approximately .
 North America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 North America