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In 2007 he also made his NASCAR Busch Series debut , driving two road course races for Dale Earnhardt , Jr. 's JR Motorsports team .
 NASCAR, Dale Earnhardt, Jr., JR Motorsports
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 NASCAR, Dale Earnhardt, Jr., JR Motorsports