(IP 
  (NP-SBJ 
    (-NONE- *PRO*))
                    
  (VP 
    (ADVP 
      (AD 当场))
                    
    (VP 
      (VV 饱餐)
                    
      (QP-EXT 
        (CD 一)
                    
        (CLP 
          (M 顿))))))
arg0: 
                    *PRO* 
                
argm: 
                    一 顿 
                
argm: 
                    当场