her was why on his hike warm parents .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 her)) (VP_4 (VBD_1 was) (VP_2 (VBN_0 why) (PP_2 (IN_0 on) (NP_3 (ATNP_0 (ATNP_0 (PRPDOLLAR_0 his) (NN_1 hike)) (JJ_0 warm)) (NNS_0 parents)))))) (DOT_0 .)))