They spit to leave to stop potatoes .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (VBD_2 spit) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 leave) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 stop) (NP_3 (NNS_1 potatoes)))))))))) (DOT_0 .)))