higher and higher they spoke one thunder .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ADVP_0 (ATADVP_10 (JJR_0 higher) (CC_0 and)) (JJR_0 higher)) (NP_0 (PRP_1 they))) (VP_3 (VBD_0 spoke) (NP_3 (CD_0 one) (NN_2 thunder)))) (DOT_0 .)))