(IP 
  (NP-SBJ 
    (NN 核四案))
                    
  (VP 
    (VP 
      (VC 是)
                    
      (NP-PRD 
        (QP 
          (CD 一)
                    
          (CLP 
            (M 个)))
                    
        (CP 
          (WHNP-2 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-2))
                    
              (VP 
                (VA 民主)))
                    
            (DEC 的)))
                    
        (NP 
          (NN 政治)
                    
          (NN 决定))))
                    
    (PU ，)
                    
    (VP 
      (ADVP 
        (AD 不))
                    
      (VP 
        (VV 应)
                    
        (VP 
          (VV 看成)
                    
          (NP-OBJ 
            (CP-APP 
              (IP 
                (NP-SBJ 
                  (-NONE- *PRO*))
                    
                (VP 
                  (VV 拥核)
                    
                  (CC 与)
                    
                  (VV 反核)))
                    
              (DEC 的))
                    
            (NP 
              (NN 争议))))))))
arg0: 
                    *PRO*