A freezing Tuesday stones , is the waist-high cluster .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_2 (ATNP_0 (DT_0 A) (NN_3 freezing)) (NP_3 (NNP_1 Tuesday) (NNS_1 stones))) (COMMA_0 ,)) (VP_4 (VBZ_0 is) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 waist-high)) (NN_1 cluster)))) (DOT_0 .)))