at the station looking for a return ticket to realism 
(ROOT (S (PP (IN at) (NP (DT the) (NN station))) (VP (VBG looking) (PP (IN for) (NP (NP (DT a) (NN return) (NN ticket)) (PP (IN to) (NP (NN realism))))))))
(ROOT (S (PP (IN ) (NP (DT ) (NN ))) (VP (VBG ) (PP (IN ) (NP (NP (DT ) (NN ) (NN )) (PP (IN ) (NP (NN ))))))))