an something fixed there refer to mahogany visible .
(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_0 an) (NN_2 something)) (VP_4 (ATVP_1 (VBD_1 fixed) (RB_1 there)) (VP_5 (VBP_0 refer) (PP_2 (TO_0 to) (NP_3 (NN_3 mahogany) (JJ_0 visible)))))) (DOT_0 .)))