who to , it did quivered to position of the sudden sky .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (TO_0 to))) (COMMA_0 ,)) (NP_0 (PRP_1 it))) (VP_3 (VBD_1 did) (VP_2 (VBN_0 quivered) (PP_2 (TO_0 to) (NP_3 (NP_5 (NN_3 position)) (PP_0 (IN_1 of) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 sudden)) (NN_1 sky)))))))) (DOT_0 .)))