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(ROOT_0 (S_0 (ATS_2 (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 leave) (NP_3 (NP_4 (NNS_1 things)) (PP_0 (IN_1 on) (NP_2 (ATNP_0 (NP_0 (PRPDOLLAR_0 his) (NNS_0 teeth)) (COMMA_0 ,)) (NP_4 (NP_5 (NN_3 water)) (NP_5 (DT_0 the) (NN_2 group)))))))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))