(IP 
  (PP-MNR 
    (P 根据)
                    
    (NP 
      (DNP 
        (NP 
          (NN 空军))
                    
        (DEG 的))
                    
      (NP 
        (NN 说法))))
                    
  (PU ，)
                    
  (NP-SBJ 
    (PN 这))
                    
  (VP 
    (VC 是)
                    
    (VP 
      (PP-MNR 
        (P 因)
                    
        (NP 
          (CP-APP 
            (IP 
              (NP-SBJ 
                (QP 
                  (ADJP 
                    (JJ 新))
                    
                  (QP 
                    (CD 一)
                    
                    (CLP 
                      (M 代))))
                    
                (NP 
                  (NN 战机)))
                    
              (VP 
                (VV 换装)))
                    
            (DEC 的))
                    
          (NP 
            (NN 过度期))))
                    
      (VP 
        (VV 导致)))))
arg0: 
                    新 一 代 战机