They should had never silly of anything .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (MD_0 should) (VP_1 (ATVP_3 (VBD_1 had) (ADJP_0 (RB_0 never) (JJ_0 silly))) (PP_0 (IN_1 of) (NP_5 (NN_3 anything)))))) (DOT_0 .)))