and the classes of finger refer But unmistakably slithered .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (CC_0 and) (NP_1 (NP_6 (DT_0 the) (NNS_1 classes)) (PP_0 (IN_1 of) (NP_2 (NN_3 finger))))) (VP_3 (ATVP_1 (VP_5 (VBP_0 refer)) (CC_0 But)) (VP_1 (ADVP_0 (RB_0 unmistakably)) (VBD_1 slithered)))) (DOT_0 .)))