on that the lesson might be who muscle below other .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ADVP_0 (IN_1 on) (DT_1 that)) (NP_0 (DT_0 the) (NN_2 lesson))) (VP_3 (MD_0 might) (VP_1 (VB_0 be) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (NP_2 (NN_3 muscle)) (ADJP_0 (RB_0 below) (JJ_0 other))))))) (DOT_0 .)))