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(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_0 (NP_4 (NNS_1 trips)) (CC_0 but)) (NNS_0 teeth)) (VP_4 (ATVP_1 (VP_5 (ATVP_4 (VB_0 try) (NP_2 (ATNP_0 (NP_4 (ATNP_0 (JJ_0 afraid) (JJ_1 muffled)) (POS_0 <apostrophe>s)) (COMMA_0 ,)) (NP_4 (NNS_1 kids)))) (PP_2 (IN_0 into) (NP_6 (DT_0 a) (NNS_1 structures)))) (CC_0 and)) (VP_5 (MD_0 could) (VP_1 (ATVP_0 (VBD_2 heard) (ADVP_0 (RB_0 below))) (SBAR_0 (IN_2 than) (S_1 (NP_0 (PRP_1 him)) (VP_5 (VBD_2 left) (S_2 (TO_0 to))))))))) (DOT_0 .)))