was n<apostrophe>t lesson it knew a heavy kids in snow .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (S_2 (VP_0 (ATVP_1 (VBD_1 was) (RB_1 n<apostrophe>t)) (NP_5 (NN_3 lesson)))) (NP_0 (PRP_1 it))) (VP_3 (VBD_0 knew) (NP_3 (NP_6 (ATNP_1 (DT_0 a) (JJ_1 heavy)) (NNS_1 kids)) (PP_0 (IN_0 in) (NP_5 (NN_3 snow)))))) (DOT_0 .)))