(IP 
  (NP-SBJ 
    (NN 基因)
                    
    (NN 疗法))
                    
  (VP 
    (ADVP 
      (AD 已经))
                    
    (VP 
      (VV 开始)
                    
      (VP 
        (VV 挽救)
                    
        (NP-OBJ 
          (DNP 
            (NP 
              (NN 患者))
                    
            (DEG 的))
                    
          (NP 
            (NN 生命)))))))
arg0: 
                    基因 疗法 
                
arg1: 
                    患者 的 生命 
                
argm: 
                    已经