They looks he mutter who march later in holes .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBZ_0 looks) (S_1 (NP_0 (PRP_1 he)) (VP_5 (VBP_0 mutter) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (ATVP_4 (VB_0 march) (NP_2 (RB_1 later))) (PP_2 (IN_0 in) (NP_3 (NNS_1 holes)))))))))) (DOT_0 .)))