(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (PP-DIR 
      (P 对)
                    
      (NP 
        (DP 
          (DT 所有))
                    
        (CP 
          (WHNP-1 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-1))
                    
              (VP 
                (PP-DIR 
                  (P 向)
                    
                  (NP 
                    (NP 
                      (NP-PN 
                        (NR 淮河))
                    
                      (NP 
                        (NN 流域)))
                    
                    (NP 
                      (NN 河流))))
                    
                (VP 
                  (VV 排污))))
                    
            (DEC 的)))
                    
        (NP 
          (NN 企业))))
                    
    (PU ，)
                    
    (VP 
      (VV 要)
                    
      (VP 
        (VV 进行)
                    
        (NP-OBJ 
          (NN 限期)
                    
          (NN 治理))))))
arg0: 
                    *T*-1 	  
                
arg1: 
                    向 淮河 流域 河流