(IP 
  (NP-SBJ 
    (CP-APP 
      (IP 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VA 欢乐)
                    
          (VV 团圆)))
                    
      (DEC 的))
                    
    (NP 
      (NN 气氛)))
                    
  (VP 
    (VP 
      (ADVP 
        (AD 固然))
                    
      (VP 
        (VV 能)
                    
        (VP 
          (VV 留下)
                    
          (NP-OBJ 
            (CP 
              (WHNP-4 
                (-NONE- *OP*))
                    
              (CP 
                (IP 
                  (NP-SBJ 
                    (-NONE- *T*-4))
                    
                  (VP 
                    (VA 温馨)
                    
                    (CC 与)
                    
                    (VA 甜美)))
                    
                (DEC 的)))
                    
            (NP 
              (NN 记忆))))))
                    
    (PU ；)
                    
    (VP 
      (ADVP 
        (AD 却))
                    
      (ADVP 
        (AD 也))
                    
      (VP 
        (VV 可能)
                    
        (VP 
          (VV 勾起)
                    
          (NP-OBJ 
            (ADJP 
              (JJ 辛酸))
                    
            (NP 
              (NN 往事))))))))
arg0: 
                    *T*-4