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In 983 Arnulf accompanied Emperor Otto II and future Emperor Otto III on their journey to Verona and Rome .
 Arnulf, Emperor Otto II, future Emperor Otto III
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Arnulf, Emperor Otto II, future Emperor Otto III