(S (S (NP (BASENP (NNP Arid) (NNP Uka)) (PRN (COMMA ,) (BASENP (NN 22)) (COMMA ,))) (VP (VP (VBD killed) (NP (NN two) (NP (NP (BASENP (NNP US)) (PRN (LRB -LRB-) (BASENP (NNP USAF)) (RRB -RRB-))) (NNS men)))) (CC and) (VP (VP (VBD wounded) (BASENP (QP (NN two) (JJR more)))) (PP (IN in) (NP (BASENP (DT a) (NN gun) (NN attack)) (PP (IN on) (NP (BASENP (PRPD their) (NN bus)) (PP (IN in))))))))) (PERIOD .))