when this felt up from a good mahogany , His giggles slithered up from baby ballet .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (SBAR_0 (WHADVP_0 (WRB_0 when)) (S_1 (NP_0 (DT_1 this)) (VP_5 (ATVP_3 (VBD_2 felt) (PRT_0 (RP_0 up))) (PP_0 (IN_1 from) (NP_6 (ATNP_1 (DT_0 a) (JJ_1 good)) (NN_1 mahogany)))))) (COMMA_0 ,)) (NP_0 (PRPDOLLAR_0 His) (NNS_0 giggles))) (VP_3 (ATVP_3 (VBD_2 slithered) (PRT_0 (RP_0 up))) (PP_2 (IN_0 from) (NP_3 (NN_3 baby) (JJ_0 ballet))))) (DOT_0 .)))