(NP-SBJ 
  (CP 
    (WHNP-1 
      (-NONE- *OP*))
                    
    (CP 
      (IP 
        (NP-SBJ 
          (-NONE- *T*-1))
                    
        (VP 
          (PP-DIR 
            (P 从)
                    
            (NP 
              (NN 戏院)
                    
              (NN 后山)))
                    
          (VP 
            (VV 瘫下))))
                    
      (DEC 的)))
                    
  (NP 
    (NN 土石流)))
arg1: 
                    *T*-1 -> 土石流          
                
argm: 
                    从 戏院 后山