it grew would back think if he teaching the tree then .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 it)) (VP_4 (VBD_2 grew) (S_2 (VP_0 (ATVP_1 (MD_0 would) (ADVP_0 (RB_0 back))) (VP_1 (VB_0 think) (SBAR_0 (IN_2 if) (S_1 (NP_0 (PRP_1 he)) (VP_5 (ATVP_4 (VBG_0 teaching) (NP_5 (DT_0 the) (NN_2 tree))) (ADVP_0 (RB_0 then)))))))))) (DOT_0 .)))