(IP 
  (IP-SBJ 
    (NP-SBJ 
      (CP 
        (WHNP-2 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *T*-2))
                    
            (VP 
              (VA 弯曲)))
                    
          (DEC 的)))
                    
      (NP 
        (NN 木杆)))
                    
    (PU ，)
                    
    (VP 
      (VV 加上)
                    
      (NP-OBJ 
        (CP 
          (WHNP-3 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-3))
                    
              (VP 
                (NP-LOC 
                  (NN 内部))
                    
                (VP 
                  (VV 填满)
                    
                  (NP-OBJ 
                    (NN 羽毛)))))
                    
            (DEC 的)))
                    
        (NP 
          (NN 皮革)
                    
          (NN 球)))))
                    
  (PU ，)
                    
  (VP 
    (ADVP 
      (AD 才))
                    
    (VP 
      (VC 是)
                    
      (NP-PRD 
        (DNP 
          (NP 
            (NN 高尔夫球))
                    
          (DEG 的))
                    
        (NP 
          (NN 远祖))))))
arg0: 
                    *T*-2