(IP 
  (PP-PRP 
    (P 由于)
                    
    (IP 
      (IP-SBJ 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (NP-TMP 
            (NT 过去))
                    
          (NP-ADV 
            (NN 长期))
                    
          (VP 
            (VP 
              (VV 围)
                    
              (NP-OBJ 
                (NN 湖)))
                    
            (VP 
              (VV 造)
                    
              (NP-OBJ 
                (NN 田))))))
                    
      (VP 
        (VV 造成)
                    
        (IP-OBJ 
          (IP 
            (NP-SBJ 
              (NP-PN 
                (NR 洞庭湖))
                    
              (NP 
                (NN 湖面)))
                    
            (VP 
              (VV 缩小)))
                    
          (PU ，)
                    
          (IP 
            (NP-SBJ 
              (CP-APP 
                (IP 
                  (NP-SBJ 
                    (-NONE- *PRO*))
                    
                  (VP 
                    (VV 调蓄)
                    
                    (NP-OBJ 
                      (NN 洪水))))
                    
                (DEC 的))
                    
              (NP 
                (NN 能力)))
                    
            (VP 
              (VV 减弱)))))))
                    
  (PU ，)
                    
  (NP-PN-SBJ 
    (NR 湖南省))
                    
  (VP 
    (NP-TMP 
      (NT 今年))
                    
    (ADVP 
      (AD 将))
                    
    (NP-ADV 
      (ADJP 
        (JJ 大))
                    
      (NP 
        (NN 规模)))
                    
    (VP 
      (VV 实行)
                    
      (IP-OBJ 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VP 
            (VV 平)
                    
            (NP-OBJ 
              (NN 垸)))
                    
          (VP 
            (VV 行)
                    
            (NP-OBJ 
              (NN 洪)))
                    
          (PU 、)
                    
          (VP 
            (VV 退)
                    
            (NP-OBJ 
              (NN 田)))
                    
          (VP 
            (VV 还)
                    
            (NP-OBJ 
              (NN 湖))))))))
arg0: 
                    *PRO* 	  
                
arg1: 
                    田 	  
                

(NP-SBJ 
  (PN 我们))
                    
(VP 
  (VV 需要)
                    
  (VP 
    (VP 
      (VV 退)
                    
      (QP-EXT 
        (CD 一)
                    
        (CLP 
          (M 步))))
arg0: 
                    我们	  
                
argm: 
                    一 步