(NP 
  (CP 
    (WHPP-1 
      (-NONE- *OP*))
                    
    (CP 
      (IP 
        (NP-SBJ 
          (NN 地球))
                    
        (VP 
          (PP-TMP 
            (-NONE- *T*-1))
                    
          (VP 
            (VP 
              (VP 
                (VV 绕)
                    
                (NP-OBJ 
                  (NP 
                    (PN 其))
                    
                  (NP 
                    (NN 轴心))))
                    
              (VP 
                (VV 自转)))
                    
            (CC 和)
                    
            (VP 
              (VP 
                (VV 绕)
                    
                (NP-OBJ 
                  (NN 太阳)))
                    
              (VP 
                (VV 公转))))))
                    
      (DEC 的)))
                    
  (NP 
    (NN 周期)))
arg0: 
                    地球 
                
argm: 
                    *T*-1