(IP-OBJ 
  (IP 
    (NP-SBJ 
      (NN 子孙))
                    
    (VP 
      (IP-ADV 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VE 有)
                    
          (NP-OBJ 
            (CP-APP 
              (IP 
                (NP-SBJ 
                  (-NONE- *PRO*))
                    
                (VP 
                  (VCD 
                    (VV 殴骂)
                    
                    (VA 不孝))))
                    
              (DEC 的))
                    
            (NP 
              (NN 行为)))))
                    
      (PU ，)
                    
      (VP 
        (LB 被)
                    
        (CP-OBJ 
          (WHNP-1 
            (-NONE- *OP*))
                    
          (IP 
            (NP-SBJ 
              (NN 父母))
                    
            (VP 
              (VV 杀死)
                    
              (NP-OBJ 
                (-NONE- *T*-1))))))))
                    
  (PU ，)
                    
  (IP 
    (NP-SBJ 
      (-NONE- *pro*))
                    
    (VP 
      (VV 可以)
                    
      (VP 
        (VV 免罪)))))
arg1: 
                    *pro*