(S (S (S (NP (BASENP (DT The) (NN family) (POS 's)) (NN car)) (VP (VBD was) (VP (ADVP (RB also)) (VBN destroyed)))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT a) (NN tree) (NN limb)) (VP (VBD landed) (PP (IN on) (BASENP (PRP it))))))) (PERIOD .))