(CP 
  (IP 
    (NP-SBJ 
      (CP 
        (WHNP-1 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *pro*))
                    
            (VP 
              (VV 留给)
                    
              (NP-IO 
                (NN 人们))
                    
              (NP-OBJ 
                (-NONE- *T*-1))))
                    
          (DEC 的)))
                    
      (NP 
        (NN 思考)))
                    
    (VP 
      (VC 是)
                    
      (VP 
        (ADVP 
          (AD 十分))
                    
        (VP 
          (VA 深刻)))))
                    
  (SP 的))
arg0: 
                    *OP* *pro* 留给 人们 *T*-1 的 思考 
                
argm: 
                    十分