(IP 
  (NP-TMP 
    (LCP-APP 
      (NP 
        (ADVP 
          (AD 大约))
                    
        (NP 
          (LCP 
            (NP 
              (NN 纪元))
                    
            (LC 前))
                    
          (NP 
            (NT 八十年))))
                    
      (LC 左右))
                    
    (PU ，)
                    
    (NP-PN 
      (NR 汉昭帝))
                    
    (NP 
      (NN 中期)))
                    
  (PU ，)
                    
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VV 开始)
                    
    (VP 
      (VP 
        (VV 命)
                    
        (NP-PN-OBJ 
          (NR 陈农))
                    
        (IP 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (VV 收集)
                    
            (NP-OBJ 
              (NN 天下)
                    
              (NN 佚书)))))
                    
      (PU ，)
                    
      (VP 
        (VV 召)
                    
        (NP-PN-OBJ 
          (NR 刘向))
                    
        (IP 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (VV 加以)
                    
            (VP 
              (VCD 
                (VV 整理)
                    
                (VV 校正)))))))))
arg0: 
                    *pro* 
                
arg1: 
                    刘向 
                
arg2: 
                    *PRO* 加以 整理 校正 
                
argm: 
                    大约 纪元 前 八十年 左右 ， 汉昭帝 中期