in kids best world , the rough arm did .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 in) (NP_6 (ATNP_1 (NP_4 (NNS_1 kids)) (JJS_0 best)) (NN_1 world))) (COMMA_0 ,)) (NP_0 (ATNP_1 (DT_0 the) (JJ_1 rough)) (NN_0 arm))) (VP_3 (VBD_0 did))) (DOT_0 .)))