(S (S (PP (IN On) (BASENP (NNP Saturday))) (S (S (BASENP (NN 24) (NNS soldiers)) (VP (VBD were) (VP (VBN killed)))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT a) (NN suicide) (NN bomber)) (VP (VP (VBD crashed) (PP (IN into) (BASENP (NN two) (NN army) (NNS vehicles)))) (PP (IN in) (NP (NP (BASENP (DT the) (NN town)) (PP (IN of) (BASENP (NNP Swat)))) (PP (IN along) (BASENP (DT the) (NNP Afghani) (NN border)))))))))) (PERIOD .))