(IP-SBJ 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 不))
                    
    (VP 
      (VV 知道)
                    
      (IP-OBJ 
        (NP-SBJ 
          (DP 
            (DT 这些))
                    
          (NP 
            (NN 塑像)))
                    
        (VP 
          (VC 是)
                    
          (NP-WH-PRD 
            (PN 谁)))))))
                    
(VP 
  (VV 倒也罢了)))
arg0: 
                    不 知道 这些 塑像 是 谁