They mumbled to care the feathers of a friend .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBD_2 mumbled) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 care) (NP_3 (NP_6 (DT_0 the) (NNS_1 feathers)) (PP_0 (IN_1 of) (NP_5 (DT_0 a) (NN_2 friend))))))))) (DOT_0 .)))