(IP-Q 
  (IP-CND 
    (NP-SBJ 
      (-NONE- *pro*))
                    
    (VP 
      (ADVP 
        (CS 倘若))
                    
      (VP 
        (VV 没有)
                    
        (VP 
          (VV 留下)
                    
          (NP-OBJ 
            (NN 游记))
                    
          (IP 
            (NP-SBJ 
              (-NONE- *PRO*))
                    
            (VP 
              (VV 供)
                    
              (NP-OBJ 
                (NN 後人))
                    
              (IP 
                (NP-SBJ 
                  (-NONE- *PRO*))
                    
                (VP 
                  (VV 传诵)))))))))
                    
  (PU ，)
                    
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP-WH 
      (AD 岂))
                    
    (ADVP 
      (AD 不))
                    
    (VP 
      (VC 是)
                    
      (IP-PRD 
        (IP 
          (IP-SBJ 
            (NP-SBJ 
              (NN 船))
                    
            (VP 
              (VV 过)))
                    
          (VP 
            (VE 无)
                    
            (NP-OBJ 
              (NN 痕))))
                    
        (PU ，)
                    
        (IP 
          (NP-SBJ 
            (-NONE- *pro*))
                    
          (VP 
            (ADVP 
              (AD 毫))
                    
            (VP 
              (VE 无)
                    
              (NP-OBJ 
                (NN 意义)))))))))
arg0: 
                    *PRO*