at freezing left the strong grass of fleas , to moved out to be jerked . him were .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (ATS_3 (NP_1 (IN_2 at) (NN_3 freezing)) (VP_4 (ATVP_3 (ATVP_2 (VBD_2 left) (NP_3 (NP_6 (ATNP_1 (DT_0 the) (JJ_1 strong)) (NN_1 grass)) (PP_0 (IN_1 of) (NP_4 (NNS_1 fleas))))) (COMMA_0 ,)) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_3 (VBD_2 moved) (PRT_0 (RP_0 out))) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 be) (VP_2 (VBN_0 jerked)))))))))) (DOT_0 .)) (NP_0 (PRP_1 him))) (VP_3 (VBD_0 were))) (DOT_0 .)))