(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 都))
                    
    (VP 
      (VC 是)
                    
      (NP-PRD 
        (CP 
          (WHNP-2 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-2))
                    
              (VP 
                (VV 使)
                    
                (NP-OBJ 
                  (NN 投资)
                    
                  (NN 人))
                    
                (IP 
                  (NP-SBJ 
                    (-NONE- *PRO*))
                    
                  (VP 
                    (VV 心存)
                    
                    (NP-OBJ 
                      (NN 观望))))))
                    
            (DEC 的)))
                    
        (NP 
          (NN 因素))))))
arg0: 
                    *PRO* 
                
arg1: 
                    观望