`` a boy , to was doing a car .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (TICK_0 ``) (NP_1 (ATNP_0 (NP_5 (DT_0 a) (NN_2 boy)) (COMMA_0 ,)) (S_2 (TO_0 to)))) (VP_3 (VBD_1 was) (VP_2 (VBG_0 doing) (NP_5 (DT_0 a) (NN_2 car))))) (DOT_0 .)))