They tossed to fell the classes of one by with hat .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBD_2 tossed) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_2 (VBD_2 fell) (NP_3 (NP_6 (DT_0 the) (NNS_1 classes)) (PP_0 (IN_1 of) (NP_2 (CD_0 one))))) (PP_2 (IN_0 by) (PP_2 (IN_0 with) (NP_5 (NN_3 hat))))))))) (DOT_0 .)))