55733
Initially working on AM Radio , then switching to the FM Radio format , Morris ' career evolved to where he became a " founding father of satellite radio at Sirius XM " , according to the station .
 Radio, Radio, Morris, XM
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Radio, Radio, Morris, XM