8452
Bayesian inference using three fossil calibration points and a relaxed molecular clock estimated a middle Miocene origin for Sigmodontinae ( ~ 12Ma ) , with most tribes diversifying throughout the Late Miocene ( 6 . 9 - 9 . 4Ma ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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