21492
A total of 18 male Sprague - Dawley albino rats were divided into three groups of six rats each as control group , in PF ( alone ) group , and PF + EVOO group .
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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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