the group mutter how it smiled darker .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_0 the) (NN_2 group)) (VP_4 (VBP_0 mutter) (SBAR_0 (WHADVP_0 (WRB_0 how)) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_1 smiled) (ADJP_0 (JJR_0 darker))))))) (DOT_0 .)))