Behind cows of something inside , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (PP_2 (IN_0 Behind) (NP_3 (NP_4 (NNS_1 cows)) (PP_0 (IN_1 of) (NP_2 (NN_2 something) (NN_3 inside))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))