(IP-ADV 
  (NP-SBJ 
    (-NONE- *PRO*))
                    
  (VP 
    (VV 溯自於)
                    
    (NP-OBJ 
      (NP 
        (NN 人类) )
                    
      (CP 
        (WHNP-1 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *T*-1))
                    
            (VP 
              (VA 长远)))
                    
          (DEC 的)))
                    
      (IP-APP 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VP 
            (VV 吃)
                    
            (NP-OBJ 
              (NN 蛇) ))
                    
          (CC 与)
                    
          (VP 
            (PP-MNR 
              (P 以)
                    
              (NP 
                (NN 蛇) ))
                    
            (VP 
              (VV 入)
                    
              (NP-OBJ 
                (NN 药))))))
                    
      (NP 
        (NN 传统)))))
arg0: 
                    *T*-1