on a uneven cluster , it did frayed , blackened .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 on) (NP_6 (ATNP_1 (DT_0 a) (JJ_1 uneven)) (NN_1 cluster))) (COMMA_0 ,)) (NP_0 (PRP_1 it))) (VP_3 (VBD_1 did) (ADJP_0 (ATADJP_0 (JJ_1 frayed) (COMMA_0 ,)) (VBN_0 blackened)))) (DOT_0 .)))