(IP-ADV 
  (NP-SBJ 
    (-NONE- *PRO*))
                    
  (VP 
    (VV 回首)
                    
    (NP-OBJ 
      (NP 
        (PN 其))
                    
      (CP 
        (WHNP-1 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-1))
                    
              (VP 
                (VV 颠沛流离)))
                    
            (PU 、)
                    
            (IP 
              (NP-TPC 
                (-NONE- *T*-1))
                    
              (NP-SBJ 
                (NN 命运))
                    
              (VP 
                (VV 乖舛))))
                    
          (DEC 的)))
                    
      (NP 
        (NN 一生)))))
arg0: 
                    *T*-1