(NP-SBJ 
  (PN 他))
                    
(VP 
  (ADVP 
    (AD 只是))
                    
  (VP 
    (VV 遣责)
                    
    (NP-OBJ 
      (NN 肇事者))
                    
    (IP 
      (NP-SBJ 
        (-NONE- *PRO*))
                    
      (VP 
        (VC 是)
                    
        (NP-PRD 
          (CP 
            (WHNP-1 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *T*-1))
                    
                (VP 
                  (VA 怯懦)))
                    
              (DEC 的)))
                    
          (NP 
            (NN 亡命之徒))))))))
arg0: 
                    他          
                
argm: 
                    只是          
                
arg1: 
                    肇事者          
                
arg2: 
                    是 怯懦 的 亡命之徒