(IP 
  (NP-SBJ 
    (NN 威胁)
                    
    (PU 、)
                    
    (NN 警告)
                    
    (CC 和)
                    
    (NN 讹诈))
                    
  (VP 
    (ADVP 
      (AD 都))
                    
    (VP 
      (VC 是)
                    
      (VP 
        (VV 没有用)))))
                    
(SP 的))
arg0: 
                    威胁 、 警告 和 讹诈          
                
argm: 
                    都