and , they smiled leave soon while back boy .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (CC_0 and) (COMMA_0 ,)) (NP_0 (PRP_1 they))) (VP_3 (VBD_1 smiled) (VP_2 (ATVP_4 (VB_0 leave) (ADVP_0 (RB_0 soon))) (PP_2 (IN_0 while) (NP_3 (JJ_1 back) (NN_0 boy)))))) (DOT_0 .)))