(IP 
  (NP-SBJ 
    (NP 
      (NN 东北))
                    
    (DP 
      (DT 各))
                    
    (NP 
      (NN 地)))
                    
  (VP 
    (VV 换下)
                    
    (NP-OBJ 
      (CP 
        (WHNP-1 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *pro*))
                    
            (VP 
              (ADVP 
                (AD 原先))
                    
              (VP 
                (VV 悬挂)
                    
                (NP-OBJ 
                  (-NONE- *T*-1)))))
                    
          (DEC 的)))
                    
      (NP 
        (NN 五色旗)))))
arg0: 
                    东北 各 地 
                
arg1: 
                    *OP* *pro* 原先 悬挂 *T*-1 的 五色旗