a boy , parents heard to stand .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_0 (NP_5 (DT_0 a) (NN_2 boy)) (COMMA_0 ,)) (NNS_0 parents)) (VP_4 (VBD_0 heard) (SBAR_0 (S_1 (VP_0 (TO_0 to) (VP_1 (VB_0 stand))))))) (DOT_0 .)))