Behind for his hippie , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (PP_2 (IN_0 Behind) (PP_2 (IN_0 for) (NP_3 (PRPDOLLAR_0 his) (NN_0 hippie)))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))