48000
Muhammad Ali 's phrasing to the press in the early part of his career was born of listening to black radio of the 1950 s , which was often white radio announcers speaking slang " jive " and imitating black announcers while withholding the fact on air of their backgrounds .
 Muhammad Ali
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Muhammad Ali