(S (S (BASENP (JJ Polish) (NN media)) (VP (ADVP (RB also)) (VP (VBZ says) (SBAR (S (S (S (BASENP (DT some) (NNS parents)) (VP (VBD were) (VP (VBN concerned) (PP (IN by) (BASENP (DT the) (NN bus)))))) (SBAR (IN before) (S (BASENP (PRP they)) (VP (VP (VBD sent) (BASENP (PRPD their) (NNS children))) (PP (IN on) (BASENP (DT the) (NN journey))))))) (COMMA ,) (SBAR (IN although) (S (BASENP (NNS others)) (VP (VBP say) (SBAR (S (BASENP (DT the) (NN bus)) (VP (VBD appeared) (ADJP (RB mechanically) (JJ safe))))))))))))) (PERIOD .))