(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (VV 联系)
                    
    (AS 了)
                    
    (NP-OBJ 
      (NP 
        (NP 
          (NN 人类))
                    
        (CP 
          (WHNP-1 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-1))
                    
              (VP 
                (VV 探索)
                    
                (NP-OBJ 
                  (NN 生命))))
                    
            (DEC 的)))
                    
        (NP 
          (NN 本能)))
                    
      (CC 与)
                    
      (NP 
        (CP-APP 
          (IP 
            (NP-SBJ 
              (-NONE- *PRO*))
                    
            (VP 
              (VV 思辨)))
                    
          (DEC 的))
                    
        (NP 
          (NN 历程))))))
arg0: 
                    *PRO*