It really howled climbing by A hat by alpaca , teeth .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (NP_1 (PRP_0 It)) (ADVP_0 (RB_0 really))) (VP_3 (VBD_1 howled) (VP_2 (VBG_0 climbing) (PP_2 (IN_0 by) (NP_3 (ATNP_0 (NP_0 (NP_5 (DT_0 A) (NN_2 hat)) (PP_0 (IN_1 by) (NP_2 (NN_3 alpaca)))) (COMMA_0 ,)) (NNS_0 teeth)))))) (DOT_0 .)))