I let who to help the alpaca valley of Spanish climbing colder and higher .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 I)) (VP_4 (VBD_0 let) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 help) (S_2 (NP_1 (NP_6 (ATNP_1 (DT_0 the) (NN_3 alpaca)) (NN_1 valley)) (PP_0 (IN_1 of) (NP_6 (NNP_1 Spanish)))) (VP_2 (VBG_0 climbing) (ADVP_0 (ATADVP_5 (JJR_0 colder) (CC_0 and)) (JJR_0 higher)))))))))) (DOT_0 .)))