They were hulking over muffled purple <apostrophe>s sitting then .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBD_2 were) (S_2 (VP_0 (ATVP_0 (VBG_0 hulking) (PRT_0 (RP_0 over))) (NP_2 (NP_4 (ATNP_0 (JJ_0 muffled) (JJ_1 purple)) (POS_0 <apostrophe>s)) (VP_2 (VBG_0 sitting) (ADVP_0 (RB_0 then)))))))) (DOT_0 .)))