(NP 
  (CP 
    (WHNP-1 
      (-NONE- *OP*))
                    
    (CP 
      (IP 
        (NP-TPC 
          (-NONE- *T*-1))
                    
        (NP-LOC 
          (NP-PN 
            (NR 中国))
                    
          (NP 
            (NN 陆上)))
                    
        (NP-SBJ 
          (QP 
            (OD 三))
                    
          (ADJP 
            (JJ 大))
                    
          (NP 
            (NN 天然气)))
                    
        (VP 
          (ADVP 
            (AD 最))
                    
          (VP 
            (VA 富集))))
                    
      (DEC 的)))
                    
  (NP-PN 
    (NR 四川)
                    
    (NN 盆地)))
arg0: 
                    三 大 天然气 
                
argm: 
                    *T*-1 
                
argm: 
                    中国 陆上 
                
argm: 
                    最