he was sheathed onto the heavy bag with the skin boulders .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 he)) (VP_4 (VBD_1 was) (VP_2 (VBN_0 sheathed) (PP_2 (IN_0 onto) (NP_3 (NP_6 (ATNP_1 (DT_0 the) (JJ_1 heavy)) (NN_1 bag)) (PP_0 (IN_1 with) (NP_2 (ATNP_0 (DT_0 the) (NN_3 skin)) (NP_4 (NNS_1 boulders))))))))) (DOT_0 .)))