classes best perch sounded sporting back .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_1 (NP_4 (NNS_1 classes)) (JJS_0 best)) (NN_0 perch)) (VP_4 (VBD_1 sounded) (VP_2 (VBG_0 sporting) (PRT_0 (RP_0 back))))) (DOT_0 .)))