he teaching they by quite higher of lisp .
(ROOT_0 (S_0 (ATS_3 (NP_0 (PRP_1 he)) (VP_2 (ATVP_4 (VBG_0 teaching) (NP_0 (PRP_1 they))) (PP_2 (IN_0 by) (NP_3 (NP_6 (RB_1 quite) (JJR_0 higher)) (PP_0 (IN_1 of) (NP_2 (NN_3 lisp))))))) (DOT_0 .)))