( (IP-MAT (PP-SBJ (NP (D sono)
                      (N koto))
                  (P-OPTR wa))
          (PU ,)
          (NP-PRD (PP (NP (PRO boku))
                      (P-ROLE no))
                  (N sei))
          (AX de)
          (P-OPTR wa)
          (NEG nai)
          (PU .))
  (ID 63_fiction_SAINT-EXUPERY-1943;JP))