(IP 
  (ADVP 
    (AD 但))
                    
  (NP-SBJ 
    (CP 
      (WHNP-2 
        (-NONE- *OP*))
                    
      (CP 
        (IP 
          (IP 
            (NP-SBJ 
              (-NONE- *T*-2))
                    
            (VP 
              (VV 深居)
                    
              (NP-OBJ 
                (NN 密林))))
                    
          (PU 、)
                    
          (IP 
            (NP-TPC 
              (-NONE- *T*-2))
                    
            (NP-SBJ 
              (NN 分布)
                    
              (NN 范围))
                    
            (VP 
              (VA 局限))))
                    
        (DEC 的)))
                    
    (NP 
      (NN 百步蛇)))
                    
  (VP 
    (ADVP 
      (AD 仍))
                    
    (VP 
      (VV 乏人问津))))
arg0: 
                    *T*-2 
                
arg1: 
                    密林