( (IP-MAT (PP-SBJ (NP (N 老人))
                  (P-OPTR は))
          (PP (NP (PRO それ))
              (P-OPTR きり))
          (VB 黙り込ん)
          (P-CONN で)
          (VB2 しまっ)
          (AXD た)
          (PU 。))
  (ID 300_aozora_Edogawa-1929;JP))