Plus He ahead classes stifled other .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_1 (CC_0 Plus) (NP_1 (PRP_0 He))) (ADVP_0 (RB_1 ahead) (NP_4 (NNS_1 classes)))) (VP_3 (VBD_1 stifled) (ADJP_0 (JJ_0 other)))) (DOT_0 .)))