(S (S (NP (BASENP (NN Two) (JJ Afghan) (NNS staff)) (PP (IN from) (BASENP (DT the) (NNP United) (NNPS Nations)))) (VP (VBP are) (ADJP (JJ feared) (S (VP (TO to) (VP (VB be) (PP (IN among) (NP (BASENP (DT the) (NNS casualties)) (PP (IN from) (BASENP (DT the) (NN attack))))))))))) (PERIOD .))