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He was the quarterback of the Princeton Tigers football team for four years from 1905 to 1908 and was selected as a first-team All-American in 1906 and 1907 .
 Princeton Tigers football
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Princeton Tigers football