(IP 
  (NP-SBJ 
    (NP-PN 
      (NR 塞))
                    
    (NP 
      (NN 政府)))
                    
  (VP 
    (ADVP 
      (AD 则))
                    
    (VP 
      (VV 坚称)
                    
      (PU ，)
                    
      (IP-OBJ 
        (IP-SBJ 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (VV 订购)
                    
            (NP-OBJ 
              (NN 导弹))))
                    
        (VP 
          (VP 
            (VC 是)
                    
            (DNP-PRD 
              (ADJP 
                (JJ 防御性))
                    
              (DEG 的)))
                    
          (PU ，)
                    
          (VP 
            (VC 是)
                    
            (PP-PRD 
              (P 为了)
                    
              (IP 
                (NP-SBJ 
                  (-NONE- *PRO*))
                    
                (VP 
                  (VV 保护)
                    
                  (NP-OBJ 
                    (NP 
                      (PN 其))
                    
                    (DNP 
                      (NP 
                        (NN 西海岸))
                    
                      (DEG 的))
                    
                    (NP 
                      (NN 空军)
                    
                      (NN 基地)))))))))))
                    
  (PU 。))
arg0: 
                    塞 政府 
                
arg1: 
                    *PRO* 订购 导弹 是 防御性 的 ， 是 为了 *PRO* 保护 其 西海岸 的 空军 基地