1345
In July 1928 , Gene Tunney upheld the heavyweight title against Tom Heeney at Yankee Stadium , and then retired as champion .
 person: Gene Tunney; person: Tom Heeney; location: Yankee Stadium
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Gene Tunney; person: Tom Heeney; location: Yankee Stadium