(S (S (S (S (NP (BASENP (NN 22)) (PP (IN of) (NP (BASENP (DT the) (NN 32)) (PP (IN on) (BASENP (NN board)))))) (VP (VBD were) (VP (VBN injured)))) (PRN (COMMA ,) (FRAG (BASENP (NN four)) (ADVP (RB critically))) (COMMA ,))) (SBAR (IN after) (S (BASENP (DT the) (NN bus)) (VP (VP (VBD smashed) (PP (IN into) (NP (BASENP (DT a) (NN concrete) (NN pillar)) (PP (IN on) (NP (BASENP (DT the) (NN A10)) (PP (IN near) (BASENP (NNP Blois)))))))) (PP (IN in) (NP (BASENP (DT the) (JJ small) (NNS hours)) (PP (IN of) (BASENP (NN yesterday) (NN morning))))))))) (PERIOD .))