17350
Still signed to the Roc , Rell went on to sing hooks for nearly every Roc-a-Fella MC since , including Jay-Z 's " It 's Obvious " and Freeway 's " Victim of the Ghetto " , and appearing on " The Message " featuring Mary J. Blige , from Dr. Dre 's Chronic 2001 .
 Jay-Z, Freeway, Mary J. Blige, Dr. Dre
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jay-Z, Freeway, Mary J. Blige, Dr. Dre