and if gravel give own swollen <apostrophe>s , on the only flats .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (CC_0 and) (NP_1 (IN_2 if) (NN_3 gravel))) (VP_3 (ATVP_3 (ATVP_2 (VB_0 give) (NP_4 (ATNP_0 (JJ_0 own) (JJ_1 swollen)) (POS_0 <apostrophe>s))) (COMMA_0 ,)) (PP_2 (IN_0 on) (NP_3 (ATNP_0 (DT_0 the) (ADJP_0 (JJ_0 only))) (NNS_0 flats))))) (DOT_0 .)))