I was shaking under on the vibrant hat .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 I)) (VP_4 (VBD_1 was) (VP_2 (VBG_0 shaking) (PP_2 (IN_0 under) (PP_2 (IN_0 on) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 vibrant)) (NN_1 hat))))))) (DOT_0 .)))