it watched leave never At climbing And back the kind was Trailing too .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_2 watched) (S_2 (VP_0 (ATVP_4 (VB_0 leave) (ADVP_0 (RB_0 never))) (PP_2 (IN_0 At) (SBAR_0 (VBG_0 climbing))))))) (CC_0 And)) (S_1 (ATS_1 (RB_1 back) (NP_5 (DT_0 the) (NN_2 kind))) (VP_3 (VBD_1 was) (VP_2 (VBG_0 Trailing) (ADVP_0 (RB_0 too)))))) (DOT_0 .)))