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He played prep school football at Potomac High School in Dumfries , Virginia , where he was honored as a Parade All-American and Virginia Defensive Player of the Year .
 Potomac High School, Dumfries , Virginia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Potomac High School, Dumfries , Virginia