at lisp at position , he was happened .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 at) (NP_3 (NP_5 (NN_3 lisp)) (PP_0 (IN_1 at) (NP_2 (NN_3 position))))) (COMMA_0 ,)) (NP_0 (PRP_1 he))) (VP_3 (VBD_1 was) (VP_2 (VBN_0 happened)))) (DOT_0 .)))