( 
  (NP-PRD 
    (NP 
      (CP 
        (WHNP-2 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *pro*))
                    
            (VP 
              (VP-PRP 
                (VRD 
                  (VV 争取)
                    
                  (VV 到))
                    
                (NP-OBJ 
                  (CP 
                    (WHNP-1 
                      (-NONE- *OP*))
                    
                    (CP 
                      (IP 
                        (NP-SBJ 
                          (-NONE- *T*-1))
                    
                        (VP 
                          (VA 有限)))
                    
                      (DEC 的)))
                    
                  (NP 
                    (NN 政府)
                    
                    (NN 武器)
                    
                    (NN 采购)
                    
                    (NN 合同))))
                    
              (VP 
                (MSP 所)
                    
                (VP 
                  (VV 必备)
                    
                  (NP-OBJ 
                    (-NONE- *T*-2))))))
                    
          (DEC 的)))
                    
      (NP 
        (NN 条件)
                    
        (NN 之一)))))
arg0:  *pro*