He studied before a valley to let .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (ATVP_3 (VBN_0 studied) (PP_2 (IN_0 before) (NP_5 (DT_0 a) (NN_2 valley)))) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 let)))))) (DOT_0 .)))