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At the age of 18 she confronted the Roman Emperor Maximus ( presumably this refers to Galerius Maximianus ) , debated his pagan philosophers , and succeeded in converting many of them to Christianity .
 Galerius
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Galerius