(IP 
  (NP-SBJ 
    (ADJP 
      (JJ 绿色))
                    
    (NP 
      (NN 食品)))
                    
  (VP 
    (VC 是)
                    
    (VP 
      (VV 指)
                    
      (NP-OBJ 
        (DP 
          (DT 那些))
                    
        (CP 
          (WHNP-1 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-1))
                    
              (VP 
                (VE 无)
                    
                (NP-OBJ 
                  (NN 污染))))
                    
            (DEC 的)))
                    
        (CP 
          (WHNP-2 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-2))
                    
              (VP 
                (VA 安全)
                    
                (PU 、)
                    
                (VA 优质)
                    
                (PU 、)
                    
                (VA 营养)))
                    
            (DEC 的)))
                    
        (NP 
          (NN 食品))))))
arg0: 
                    *T*-2