it were plastic and refer the afraid boulders never .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 it)) (VP_4 (ATVP_1 (VP_5 (VBD_0 were) (ADJP_0 (JJ_0 plastic))) (CC_0 and)) (VP_5 (ATVP_4 (VBP_0 refer) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 afraid)) (NNS_1 boulders))) (ADVP_0 (RB_0 never))))) (DOT_0 .)))