rtokens: " Angry students cut the telephone , water and electricity of the university offices before smashing the windows and breaking down the doors . "
pos: " DT NN CC PRP$ NNS WP VBD VBN IN DT NN POS NN VBD VBN NNS DT NN IN NNS , " CD NN NN VBD .
tokens: " The minister and his colleagues who were held in the rector 's office were freed thanks an intervention by gendarmes , " one university official said .
ltokens: 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 .