They <apostrophe>s low , of one knees .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBZ_0 <apostrophe>s) (ADJP_0 (ATADJP_0 (JJ_1 low) (COMMA_0 ,)) (PP_1 (IN_1 of) (NP_2 (CD_0 one) (NNS_0 knees)))))) (DOT_0 .)))