(IP 
  (NP-SBJ 
    (DP 
      (DT 该))
                    
    (NP 
      (NN 囚犯)))
                    
  (VP 
    (VV 表示)
                    
    (IP-OBJ 
      (NP-SBJ 
        (-NONE- *pro*))
                    
      (VP 
        (ADVP 
          (AD 不))
                    
        (VP 
          (VV 欲)
                    
          (IP-OBJ 
            (NP-SBJ 
              (-NONE- *PRO*))
                    
            (VP 
              (PP-TMP 
                (P 在)
                    
                (LCP 
                  (IP 
                    (NP-SBJ 
                      (DP 
                        (DT 该))
                    
                      (NP 
                        (NN 信件)))
                    
                    (VP 
                      (VP 
                        (VV 开启))
                    
                      (CC 和)
                    
                      (VP 
                        (VV 搜查))))
                    
                  (LC 时)))
                    
              (VP 
                (VV 在场)))))))))
arg0: 
                    *PRO* 
                
argm: 
                    在 该 信件 开启 和 搜查 时