(IP 
  (NP-PN-SBJ 
    (NR 哥伦比亚))
                    
  (VP 
    (VC 是)
                    
    (NP-PRD 
      (NP 
        (CP 
          (WHNP-2 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-2))
                    
              (VP 
                (LCP-LOC 
                  (NP 
                    (NN 世界))
                    
                  (LC 上))
                    
                (VP 
                  (VP 
                    (VV 生产)
                    
                    (NP-OBJ 
                      (-NONE- *RNR*-1)))
                    
                  (CC 和)
                    
                  (VP 
                    (VV 贩运)
                    
                    (NP-OBJ-1 
                      (NN 毒品))))))
                    
            (DEC 的)))
                    
        (NP 
          (ADJP 
            (JJ 主要))
                    
          (NP 
            (NN 国家))))
                    
      (NP 
        (NN 之一))))
                    
  (PU 。))
arg0: 
                    *T*-2 
                
arg1: 
                    毒品 
                
argm: 
                    世界 上