(CP 
  (WHPP-1 
    (-NONE- *OP*))
                    
  (CP 
    (IP 
      (NP-SBJ 
        (-NONE- *pro*))
                    
      (VP 
        (PP-TMP 
          (-NONE- *T*-1))
                    
        (NP-TMP 
          (DP 
            (DT 上)
                    
            (QP 
              (M 个)))
                    
          (NP 
            (NN 月)))
                    
        (PP-LOC 
          (P 在)
                    
          (NP 
            (NN 公园)))
                    
        (VP 
          (VV 溜)
                    
          (NP-OBJ 
            (NN 滑梯)))))
                    
    (DEC 的)))
                    
(NP 
  (NN 时候)))
arg0: 
                    *pro*          
                
argm: 
                    *T*-1 -> 时候          
                
argm: 
                    上 个 月          
                
argm: 
                    在 公园          
                
arg1: 
                    滑梯