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Opposition Grand Ayatollah Alavi Gorgani is a leading critic of Khamenei and has repeatedly questioned his clerical credentials .
 Ayatollah Alavi Gorgani, Khamenei
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ayatollah Alavi Gorgani, Khamenei