(IP 
  (NP-PN-SBJ 
    (NR 美国))
                    
  (VP 
    (VV 履行)
                    
    (AS 了)
                    
    (NP-OBJ 
      (CP-APP 
        (IP 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (PP 
              (P 与)
                    
              (NP-PN 
                (NR 台湾)))
                    
            (VP 
              (PU “)
                    
              (VV 断交)
                    
              (PU 、)
                    
              (VV 废约)
                    
              (PU 、)
                    
              (VV 撤军)
                    
              (PU ”))))
                    
        (DEC 的))
                    
      (NP 
        (NN 承诺)))))
arg0: 
                    *PRO* 
                
arg1: 
                    与 台湾