who had to trips if an anything outside halt , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (ATVP_4 (VBD_2 had) (PP_2 (TO_0 to) (NP_3 (NNS_1 trips)))) (PP_2 (IN_0 if) (NP_3 (NP_5 (DT_0 an) (NN_2 anything)) (PP_0 (IN_1 outside) (NP_2 (NN_3 halt)))))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))