(NP 
  (CP 
    (WHNP-2 
      (-NONE- *OP*))
                    
    (CP 
      (IP 
        (NP-TPC 
          (-NONE- *T*-2))
                    
        (ADVP 
          (AD 不时))
                    
        (NP-SBJ 
          (NN 水患)
                    
          (PU 、)
                    
          (NN 土石))
                    
        (VP 
          (VV 横流)))
                    
      (DEC 的)))
                    
  (NP 
    (NT 今天)))
arg0: 
                    水患 、 土石 
                
argm: 
                    不时 
                
argm: 
                    *T*-2