to keep up in A feathers , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (VP_0 (TO_0 to) (VP_1 (ATVP_2 (VB_0 keep) (PRT_0 (RP_0 up))) (PP_1 (IN_1 in) (NP_2 (DT_0 A) (NNS_1 feathers)))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))