(NP-SBJ 
  (-NONE- *pro*))
                    
(VP 
  (ADVP 
    (AD 初步))
                    
  (VP 
    (VV 研判)
                    
    (PU ，)
                    
    (IP-OBJ 
      (NP-SBJ 
        (NN 死者))
                    
      (VP 
        (VV 应该)
                    
        (VP 
          (VC 是)
                    
          (NP-PRD 
            (NN 他杀))))))))
arg0: 
                    *pro*          
                
argm: 
                    初步          
                
arg1: 
                    死者 应该 是 他杀