(ADVP 
  (AD 好在))
                    
(NP-SBJ 
  (NN 船长))
                    
(VP 
  (LCP-TMP 
    (IP 
      (NP-SBJ-1 
        (-NONE- *pro*))
                    
      (VP 
        (SB 被)
                    
        (VP 
          (VV 囚禁)
                    
          (NP-OBJ 
            (-NONE- *-1)))))
                    
    (LC 前))
                    
  (DVP 
    (VP 
      (VA 机警))
                    
    (DEV 的))
                    
  (VP 
    (VV 按下)
                    
    (NP-OBJ 
      (NN 求救)
                    
      (NN 信号)))
argm: 
                    好在          
                
arg0: 
                    船长          
                
argm: 
                    被 囚禁 前          
                
argm: 
                    机警 的          
                
arg1: 
                    求救 信号