(IP 
  (PP-ADV 
    (P 由于)
                    
    (IP 
      (NP-SBJ 
        (-NONE- *pro*))
                    
      (VP 
        (ADVP 
          (AD 长期))
                    
        (VP 
          (VV 暴露)
                    
          (PP-LOC 
            (P 于)
                    
            (NP 
              (NN 地表)))))))
                    
  (PU ，)
                    
  (NP-SBJ 
    (PN 有些))
                    
  (VP 
    (ADVP 
      (AD 已经))
                    
    (VP 
      (VV 破碎))) )
arg0: 
                    有些 	  
                
argm: 
                    已经 	  
                
argm: 
                    由于 *pro* 长期 暴露 于 地表