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In Nigeria , chancellors are ceremonial heads of public universities ( mostly traditional monarchs ) , appointed by the head of state ( president ) , governor of a state ( in the case of state-owned universities ) or assumed by the owner of a private university .
 Nigeria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nigeria