They forced warm , red back by lesson .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (ATVP_3 (VBD_1 forced) (ADJP_0 (ATADJP_0 (ATADJP_0 (JJ_1 warm) (COMMA_0 ,)) (JJ_0 red)) (JJ_1 back))) (PP_1 (IN_1 by) (NP_2 (NN_3 lesson))))) (DOT_0 .)))