(IP 
  (NP-SBJ 
    (CP 
      (WHNP-1 
        (-NONE- *OP*))
                    
      (CP 
        (IP 
          (NP-SBJ 
            (-NONE- *T*-1))
                    
          (VP 
            (NP-TMP 
              (NT 目前))
                    
            (PP-LOC 
              (P 在)
                    
              (NP 
                (NN 世界)
                    
                (NN 网坛)))
                    
            (VP 
              (VV 排名)
                    
              (QP-OBJ 
                (OD 第一)))))
                    
        (DEC 的)))
                    
    (NP-APP 
      (NP-PN 
        (NR 美国))
                    
      (NP 
        (NN 选手)))
                    
    (NP-PN 
      (NR 桑普拉斯)))
                    
  (PU ，)
                    
  (VP 
    (PP-TMP 
      (P 自)
                    
      (LCP 
        (NP 
          (NT ７月)
                    
          (NN 中旬))
                    
        (LC 以来)))
                    
    (ADVP 
      (AD 就))
                    
    (ADVP 
      (AD 一直))
                    
    (ADVP 
      (AD 未))
                    
    (PP-LOC 
      (P 在)
                    
      (LCP 
        (NP 
          (NN 比赛场))
                    
        (LC 上)))
                    
    (VP 
      (VV 露面))))
arg0: 
                    *OP* *T*-1 目前 在 世界 网坛 排名 第一 的 美国 选手 桑普拉斯 
                
argm: 
                    在 比赛场 上 
                
argm: 
                    未 
                
argm: 
                    一直 
                
argm: 
                    就 
                
argm: 
                    自 ７月 中旬 以来