rtokens: " The minister and his colleagues who were held in the rector 's office were freed thanks an intervention by gendarmes , " one university official said .
pos: DT NN IN NNP VBZ VBN NNP NNP IN CD NNS IN NNS IN NN NNS IN WDT NNP NNP NNP NNP VBD VBN NN IN CD NNS , NN NN VBD IN NNP .
tokens: 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 .
ltokens: N'DJAMENA 1996-08-30