2473
For example , in years when not a part of the national championship , the Rose Bowl still hosted the Big Ten and Pac-10 champions .
 Rose Bowl, Big Ten, Pac-10
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rose Bowl, Big Ten, Pac-10