than a boy , he could be she .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 than) (NP_5 (DT_0 a) (NN_2 boy))) (COMMA_0 ,)) (NP_0 (PRP_1 he))) (VP_3 (MD_0 could) (VP_1 (VB_0 be) (NP_0 (PRP_1 she))))) (DOT_0 .)))