(S (S (BASENP (NN Traffic) (NN safety)) (VP (VBZ is) (VP (VBN feared) (S (VP (TO to) (VP (VB be) (NP (NP (BASENP (DT a) (NN threat)) (PP (IN of) (BASENP (NN injury)))) (PP (TO to) (NP (BASENP (NNS supporters)) (PP (TO to) (BASENP (DT the) (NNP World) (NNP Cup)))))))))))) (PERIOD .))