(IP 
  (NP-TMP 
    (NT 过去))
                    
  (NP-PN-SBJ 
    (NN 林务局))
                    
  (VP 
    (VP 
      (PP-LOC 
        (P 在)
                    
        (NP 
          (NP 
            (DP 
              (DT 各))
                    
            (NP 
              (NN 处)))
                    
          (NP 
            (NN 伐木区))))
                    
      (VP 
        (VV 保留)
                    
        (NP-OBJ 
          (QP 
            (CD 少数))
                    
          (NP 
            (NN 桧木)
                    
            (NN 母树)))))
                    
    (PU ，)
                    
    (VP 
      (VV 寄望)
                    
      (NP-OBJ 
        (PN 它们))
                    
      (IP 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (ADVP 
            (AD 天然))
                    
          (VP 
            (VV 下种)))))
                    
    (PU ，)
                    
    (VP 
      (ADVP 
        (AD 却))
                    
      (VP 
        (VV 发现)
                    
        (IP-OBJ 
          (NP-SBJ 
            (CP 
              (WHNP-1 
                (-NONE- *OP*))
                    
              (CP 
                (IP 
                  (NP-SBJ 
                    (-NONE- *T*-1))
                    
                  (VP 
                    (ADVP 
                      (AD 毫))
                    
                    (VP 
                      (VE 无)
                    
                      (NP-OBJ 
                        (NN 外伤)))))
                    
                (DEC 的)))
                    
            (NP 
              (NN 母树)))
                    
          (VP 
            (ADVP 
              (AD 一一))
                    
            (VP 
              (VV 凋零))))))))
arg0: 
                    *PRO* 
                
argm: 
                    天然