They discovered <apostrophe>s when The did Ohio and pale grew n<apostrophe>t morning brown .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBD_1 discovered) (VP_2 (VBZ_0 <apostrophe>s) (SBAR_0 (WHADVP_0 (WRB_0 when)) (S_1 (NP_0 (DT_1 The)) (VP_5 (ATVP_1 (VP_5 (VBD_0 did) (NP_6 (NNP_1 Ohio))) (CC_0 and)) (ADJP_0 (JJ_0 pale) (S_2 (VP_0 (ATVP_1 (VBD_1 grew) (RB_1 n<apostrophe>t)) (NP_6 (NN_3 morning) (JJ_0 brown))))))))))) (DOT_0 .)))