(IP 
  (NP-TMP 
    (NT 今年)
                    
    (NT ２月))
                    
  (PU ，)
                    
  (NP-PN-SBJ 
    (NR 美国))
                    
  (VP 
    (VP 
      (PP-LOC 
        (P 在)
                    
        (NP 
          (NN 海湾)))
                    
      (VP 
        (VV 集结)
                    
        (AS 了)
                    
        (NP-OBJ 
          (CP 
            (WHNP-1 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *T*-1))
                    
                (VP 
                  (LCP-TMP 
                    (NP 
                      (NN 海湾)
                    
                      (NN 战争))
                    
                    (LC 以来))
                    
                  (ADVP 
                    (AD 最))
                    
                  (VP 
                    (VA 强))))
                    
              (DEC 的)))
                    
          (NP 
            (NN 兵力)))))
                    
    (PU ，)
                    
    (VP 
      (VV 威胁)
                    
      (IP-OBJ 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VV 要)
                    
          (VP 
            (PP-DIR 
              (P 对)
                    
              (NP-PN 
                (NR 伊)))
                    
            (VP 
              (VV 动武)))))))
                    
  (PU 。))
arg0: 
                    美国 
                
arg1: 
                    *OP* *T*-1 海湾 战争 以来 最 强 的 兵力 
                
argm: 
                    今年 ２月 
                
argm: 
                    在 海湾