It was sharp Because boy under class brown .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (ATVP_4 (VBD_0 was) (ADJP_0 (JJ_1 sharp) (PP_1 (IN_1 Because) (NP_2 (NN_3 boy))))) (PP_2 (IN_0 under) (NP_3 (NN_3 class) (JJ_0 brown))))) (DOT_0 .)))