in trips Plus trips and to , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (PP_2 (ATPP_0 (PP_1 (IN_1 in) (NP_2 (ATNP_0 (NP_4 (NNS_1 trips)) (CC_0 Plus)) (NP_4 (NNS_1 trips)))) (CC_0 and)) (S_2 (VP_0 (TO_0 to)))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))