(S (S (BASENP (DT The) (NNP Vancouver) (NNP Fire) (NNP Department)) (VP (VBZ says) (SBAR (S (BASENP (PRP they)) (VP (VP (VBP have) (BASENP (DT no) (NN idea))) (PP (IN as) (PP (TO to) (SBAR (WHADVP (WRB why)) (S (BASENP (DT the) (NN building)) (VP (VBD collapsed))))))))))) (PERIOD .))