(CP 
  (WHNP-2 
    (-NONE- *OP*))
                    
  (CP 
    (IP 
      (NP-SBJ 
        (-NONE- *T*-2))
                    
      (VP 
        (PP-PRP 
          (P 因为)
                    
          (IP 
            (NP-SBJ 
              (-NONE- *pro*))
                    
            (VP 
              (NP-LOC 
                (NN 白水案))
                    
              (VP 
                (VV 包庇)
                    
                (NP-PN-OBJ 
                  (NR 克林顿))))))
                    
        (VP 
          (MSP 而)
                    
          (VP 
            (VV 坐牢)))))
                    
    (DEC 的)))
                    
(NP 
  (NN 好友)))
arg0: 
                    *T*-2 ->  好友          
                
argm: