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The Battle of Chelenqo was an engagement fought on 6 January 1887 between the army of Shewa under Negus Menelik II and Emir ' Abd Allah II of Harar .
 Menelik II, ' Abd Allah II, Harar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Menelik II, ' Abd Allah II, Harar