All car dropped to help over of four parents .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 All) (NN_2 car)) (VP_4 (VBD_2 dropped) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_2 (VB_0 help) (PRT_0 (RP_0 over))) (PP_1 (IN_1 of) (NP_0 (CD_0 four) (NNS_0 parents)))))))) (DOT_0 .)))