(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VV 使)
                    
    (NP-OBJ 
      (NP-PN 
        (NR 龙开河))
                    
      (NP 
        (NN 下游段)))
                    
    (IP 
      (NP-SBJ 
        (-NONE- *PRO*))
                    
      (VP 
        (VV 成)
                    
        (AS 了)
                    
        (NP-OBJ 
          (CP 
            (WHPP-1 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *pro*))
                    
                (VP 
                  (PP-LOC 
                    (-NONE- *T*-1))
                    
                  (NP-TMP 
                    (NT 历年))
                    
                  (ADVP 
                    (AD 紧张))
                    
                  (VP 
                    (VV 抗洪))))
                    
              (DEC 的)))
                    
          (NP 
            (NN 战场)))))))
arg0: 
                    *pro* 
                
argm: 
                    *T*-1 
                
argm: 
                    历年 
                
argm: 
                    紧张