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In the " Behind the Music " documentary series , Halford said that hiding his sexuality during Judas Priest 's career caused him a lot of depression and isolation which led to his alcohol and drug abuse .
 Halford, Judas Priest
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Halford, Judas Priest