(IP-OBJ 
  (NP-SBJ 
    (NP-PN 
      (NR 澳洲))
                    
    (NP 
      (NN 学者)))
                    
  (VP 
    (VP 
      (VV 提出)
                    
      (IP-OBJ 
        (NP-APP 
          (NN 警告))
                    
        (PU ，)
                    
        (IP 
          (NP-SBJ 
            (NN 行动)
                    
            (NN 电话))
                    
          (VP 
            (VV 可能)
                    
            (VP 
              (VV 会)
                    
              (VP 
                (VV 引起)
                    
                (NP-OBJ 
                  (NN 脑)
                    
                  (NN 病变)
                    
                  (PU 、)
                    
                  (NN 脑瘤))))))))
                    
    (PU ，)
                    
    (VP 
      (VV 建议)
                    
      (NP-OBJ 
        (-NONE- *pro*))
                    
      (IP 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (ADVP 
            (AD 不))
                    
          (VP 
            (VV 要)
                    
            (VP 
              (NP-ADV 
                (ADJP 
                  (JJ 长))
                    
                (NP 
                  (NN 时间)))
                    
              (VP 
                (VV 通话)))))))))
arg0: 
                    *PRO* 
                
argm: 
                    长 时间 
                
argm: 
                    不