(S (S (NP (NP (NP (BASENP (NNS Countries)) (ADJP (JJ unwilling) (S (VP (TO to) (VP (VB contribute) (BASENP (NNS forces))))))) (CONJP (COMMA ,) (CC and)) (NP (BASENP (JJ constant) (NN government) (NNS restrictions)) (PP (IN from) (BASENP (NNP Sudan))))) (COMMA ,)) (VP (VBP have) (VP (VBN contributed) (PP (TO to) (NP (NP (BASENP (DT the) (JJ slow) (NN movement)) (PP (IN of) (BASENP (NNS troops)))) (PP (TO to) (BASENP (DT the) (NN region)))))))) (PERIOD .))