a cows by the back aura , kids have this classes .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NP_6 (DT_0 a) (NNS_1 cows)) (PP_0 (IN_1 by) (NP_2 (ATNP_2 (NP_6 (ATNP_1 (DT_0 the) (JJ_1 back)) (NN_1 aura)) (COMMA_0 ,)) (NNS_1 kids)))) (VP_4 (VBP_0 have) (NP_6 (DT_0 this) (NNS_1 classes)))) (DOT_0 .)))