(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 已))
                    
    (VP 
      (VV 成为)
                    
      (NP-OBJ 
        (CP 
          (WHPP-2 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (NN 乡民))
                    
              (VP 
                (PP-LOC 
                  (-NONE- *T*-2))
                    
                (VP 
                  (VV 散步)
                    
                  (PU 、)
                    
                  (VV 嬉戏))))
                    
            (DEC 的)))
                    
        (ADJP 
          (ADVP 
            (AD 最))
                    
          (ADJP 
            (JJ 佳)))
                    
        (NP 
          (NN 休闲处))))))
arg0: 
                    乡民 
                
argm: 
                    *T*-2