(S (S (BASENP (DT This)) (VP (VBZ is) (SBAR (WHADVP (WRB why)) (S (NP (EX there)) (VP (ADVP (RB usually)) (VP (VP (VBZ is) (BASENP (DT no) (NNS injuries) (CC or) (NNS casualties))) (PP (IN in) (BASENP (JJ such) (NNS cases))))))))) (PERIOD .))