a sudden smile about a low nap might n<apostrophe>t there meant then .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NP_6 (ATNP_1 (DT_0 a) (JJ_1 sudden)) (NN_1 smile)) (PP_0 (IN_1 about) (NP_6 (ATNP_1 (DT_0 a) (JJ_1 low)) (NN_1 nap)))) (VP_4 (ATVP_1 (MD_0 might) (ADVP_0 (RB_1 n<apostrophe>t) (RB_1 there))) (VP_5 (VBD_1 meant) (ADVP_0 (RB_0 then))))) (DOT_0 .)))