1840
Four African states are ready to nominate candidates for the post of U.N. secretary-general on Friday now that Boutros Boutros-Ghali has temporarily put aside his bid for re-election .
 organization: U.N.; else: African; person: Boutros Boutros-Ghali
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 organization: U.N.; else: African; person: Boutros Boutros-Ghali