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Randle John Montgomery ( born August 12 , 1947 in Houston , Texas ) was a National Football League cornerback and kick returner for the Denver Broncos and Chicago Bears .
 Montgomery, Houston , Texas, National Football League, Denver Broncos, Chicago Bears
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Montgomery, Houston , Texas, National Football League, Denver Broncos, Chicago Bears