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(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 The) (NN_2 lesson)) (VP_4 (VBP_0 refer) (SBAR_0 (WHADVP_0 (WRB_0 when)) (S_1 (NP_0 (DT_1 that)) (VP_5 (ATVP_4 (VB_0 care) (NP_2 (JJ_1 burgundy) (NNS_1 stones))) (ADVP_0 (RB_0 Not))))))) (DOT_0 .)))