friends piled storms his lip n<apostrophe>t at every hike <apostrophe><apostrophe> ?
(ROOT_0 (S_0 (ATS_3 (NP_1 (NNS_0 friends)) (VP_4 (VBD_2 piled) (S_2 (VP_0 (ATVP_4 (VBZ_0 storms) (NP_2 (PRPDOLLAR_0 his) (NN_0 lip))) (PP_2 (ATPP_0 (ATPP_0 (RB_1 n<apostrophe>t) (IN_1 at)) (NP_5 (DT_0 every) (NN_2 hike))) (APOSTROPHE_0 <apostrophe><apostrophe>)))))) (DOT_0 ?)))