(IP 
  (NP-SBJ 
    (PN 这))
                    
  (VP 
    (ADVP 
      (AD 显然))
                    
    (VP 
      (VC 是)
                    
      (NP-PRD 
        (DNP 
          (NP 
            (DNP 
              (NP 
                (NP-APP 
                  (NT １７０７年))
                    
                (DNP 
                  (NP 
                    (NT 最近))
                    
                  (DEG 的))
                    
                (DP 
                  (DT 那)
                    
                  (CLP 
                    (M 次)))
                    
                (NP 
                  (NN 喷发)))
                    
              (DEG 的))
                    
            (NP 
              (NN 火山灰)))
                    
          (DEG 的))
                    
        (NP 
          (NN 残迹))))))
arg1: 
                    火山灰 	  
                
argm: 
                    那 次 
                
argm: 
                    最近 	  
                
argm: 
                    １７０７年