Vida howled the valley n<apostrophe>t discovered missing swollen knees .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NNP_0 Vida)) (VP_4 (ATVP_1 (VBD_1 howled) (ADVP_0 (NP_5 (DT_0 the) (NN_2 valley)) (RB_1 n<apostrophe>t))) (VP_5 (VBD_1 discovered) (NP_3 (ATNP_0 (JJ_0 missing) (JJ_1 swollen)) (NNS_0 knees))))) (DOT_0 .)))