(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (PP-DIR 
      (P 由)
                    
      (NP 
        (DNP 
          (NP-PN 
            (NR 夏阳))
                    
          (DEG 的))
                    
        (NP 
          (NN 打油诗))))
                    
    (VP 
      (VV 可)
                    
      (VP 
        (VV 看出)
                    
        (NP-OBJ 
          (NP 
            (DP 
              (DT 这)
                    
              (CLP 
                (M 对)))
                    
            (CP 
              (WHNP-1 
                (-NONE- *OP*))
                    
              (CP 
                (IP 
                  (NP-SBJ 
                    (-NONE- *T*-1))
                    
                  (VP 
                    (NP-TMP 
                      (NN 中年))
                    
                    (ADVP 
                      (AD 始))
                    
                    (VP 
                      (VV 结发))))
                    
                (DEC 的)))
                    
            (NP 
              (NN 夫妻)))
                    
          (PU ，)
                    
          (CP-APP 
            (IP 
              (NP-SBJ 
                (-NONE- *PRO*))
                    
              (VP 
                (VV 相看两不厌)))
                    
            (DEC 的))
                    
          (ADJP 
            (JJ 款款))
                    
          (NP 
            (NN 深情)))))))
arg0: 
                    *PRO*