(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VP 
      (VV 使)
                    
      (NP-OBJ 
        (DNP 
          (NP 
            (QP 
              (CD 一些))
                    
            (NP 
              (NN 地区)))
                    
          (DEG 的))
                    
        (NP 
          (NN 群众)))
                    
      (IP 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VP-FOC 
            (VV 饮水))
                    
          (VP 
            (VV 发生)
                    
            (NP-OBJ 
              (NN 困难))))))
                    
    (PU ，)
                    
    (VP 
      (ADVP 
        (AD 直接))
                    
      (VP 
        (VV 危及)
                    
        (AS 了)
                    
        (NP-OBJ 
          (DNP 
            (NP 
              (NN 下游)
                    
              (NN 人民))
                    
            (DEG 的))
                    
          (NP 
            (NN 生活)
                    
            (CC 和)
                    
            (NN 生产)))))))
arg0: 
                    *PRO*