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Williams said many of its students and teachers had backed up their files in the cloud and were not affected by the ransomware attack , but backups stored on servers at the school were also encrypted by the hackers .
 servers: victim; the school: victim; the hackers: attacker
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:
 servers: victim; the school: victim; the hackers: attacker