(IP 
  (PP-ADV 
    (P 除)
                    
    (IP 
      (NP-SBJ 
        (-NONE- *PRO*))
                    
      (VP 
        (VV 紧抓)
                    
        (NP-OBJ 
          (NN 治安)))))
                    
  (PU ，)
                    
  (NP-SBJ 
    (NN 目的))
                    
  (VP 
    (ADVP 
      (AD 更))
                    
    (ADVP 
      (AD 在))
                    
    (VP 
      (VV 致力)
                    
      (IP-OBJ 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VV 防范)
                    
          (NP-OBJ 
            (NN 大陆)
                    
            (NN 境内))
                    
          (IP 
            (NP-SBJ 
              (-NONE- *PRO*))
                    
            (VP 
              (PP-MNR 
                (P 藉)
                    
                (NP 
                  (NT 六四)))
                    
              (VP 
                (PU 「)
                    
                (VV 闹事)
                    
                (PU 」)))))))))
arg0: 
                    *PRO* 
                
argm: 
                    藉 六四