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The Geringian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology ( NALMA ) , typically set from 30,800,000 to 26,300,000 years BP , a period of .
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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:
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