(IP 
  (LCP-TMP 
    (IP 
      (NP-SBJ 
        (-NONE- *PRO*))
                    
      (VP 
        (VV 卸任)))
                    
    (LC 后))
                    
  (PU ，)
                    
  (NP-PN-SBJ 
    (NR 尼克松)
                    
    (NN 先生))
                    
  (VP 
    (VV 继续)
                    
    (VP 
      (VP 
        (VV 关心)
                    
        (NP-OBJ 
          (NP-PN 
            (NR 中)
                    
            (NR 美))
                    
          (NP 
            (NN 关系))))
                    
      (PU ，)
                    
      (VP 
        (PP-PRP 
          (P 为)
                    
          (IP 
            (NP-SBJ 
              (-NONE- *PRO*))
                    
            (VP 
              (VP 
                (VV 维护)
                    
                (NP-OBJ 
                  (-NONE- *RNR*-1)))
                    
              (CC 和)
                    
              (VP 
                (VV 发展)
                    
                (NP-OBJ-1 
                  (NP 
                    (QP 
                      (CD 两))
                    
                    (NP 
                      (NN 国)))
                    
                  (NP 
                    (NN 关系)))))))
                    
        (VP 
          (VV 作出)
                    
          (AS 了)
                    
          (NP-OBJ 
            (ADJP 
              (JJ 重要))
                    
            (NP 
              (NN 贡献))))))))
arg0: 
                    *PRO*