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The government of Chad has closed N'Djamena University after two days of protests over grant arrears in which Education Minister Nagoum Yamassoum was held hostage for four hours , state radio said on Friday .
 person: Nagoum Yamassoum; organization: N'Djamena University; location: Chad
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:
 person: Nagoum Yamassoum; organization: N'Djamena University; location: Chad