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The Groop were an Australian folk , R&B and rock band formed in 1964 in Melbourne , Australia and had their greatest chart success with their second line-up of Max Ross on bass , Richard Wright on drums and vocals , Don Mudie on lead guitar , Brian Cadd on keyboards and vocals , and Ronnie Charles on vocals .
 Melbourne, Brian Cadd, Ronnie
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Melbourne, Brian Cadd, Ronnie