(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VV 听)
                    
    (DER 得)
                    
    (IP-EXT 
      (NP-SBJ 
        (CP 
          (WHNP-1 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-1))
                    
              (VP 
                (ADVP 
                  (AD 快))
                    
                (VP 
                  (QP-PRD 
                    (CD 八十)
                    
                    (CLP 
                      (M 岁))))))
                    
            (DEG 的)))
                    
        (ADJP 
          (JJ 老))
                    
        (NP 
          (NN 镖客)))
                    
      (VP 
        (VV 目瞪口呆)))))
arg0: 
                    *OP* *T*-1 快 八十 岁 的 老 镖客