593
A short time later , a message flashed on a hospital computer screen , stating parts of the system would be held hostage until a ransom is paid .
 be held hostage: attack pattern; the system: victim
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 be held hostage: attack pattern; the system: victim