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One week ago a global cyberattack dubbed “ unprecedented ” by Europol began infecting an estimated 200,000 of the world ’s computers , starting a seven - day countdown to the destruction of data if victims did not pay a ransom .
 One week ago: time
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:
 One week ago: time