and himself asked back dropped parents to brushed out at the boulders .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (CC_0 and) (NP_1 (PRP_0 himself))) (VP_3 (ATVP_1 (VBD_0 asked) (RB_1 back)) (VP_5 (VBD_2 dropped) (S_2 (NP_1 (NNS_0 parents)) (VP_0 (TO_0 to) (VP_1 (ATVP_3 (VBD_2 brushed) (PRT_0 (RP_0 out))) (PP_0 (IN_1 at) (NP_2 (DT_0 the) (NNS_1 boulders))))))))) (DOT_0 .)))