According to the United Nations secretary general , Kofi Annan , a cessation of hostilities means an immediate truce , while a cease-fire has to be negotiated and usually takes longer .
Kofi Annan /business/person/company United Nations
VBG TO DT NNP NNPS NN JJ , NNP NNP , DT NN IN NNS VBZ DT JJ NN , IN DT NN VBZ TO VB VBN CC RB VBZ RBR .
Kofi Annan
PERSON
United Nations
ORGANIZATION
/business/person/company