54783
In January 1938 , Welch was made the superivsor of all of Olympic manager Harry Popkin 's boxing operations in Los Angeles and San Francisco .
 Welch, Los Angeles, San Francisco
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Welch, Los Angeles, San Francisco