They to be to be up what to stop him left to stop boy .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NP_1 (PRP_0 They)) (SBAR_0 (VP_0 (TO_0 to) (VP_1 (VB_0 be) (SBAR_0 (VP_0 (TO_0 to) (VP_1 (ATVP_0 (VB_0 be) (PRT_0 (RP_0 up))) (SBAR_0 (WHNP_0 (WP_0 what)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 stop) (NP_1 (PRP_0 him))))))))))))) (VP_4 (VBD_2 left) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 stop) (NP_0 (NN_2 boy))))))) (DOT_0 .)))