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For instance , in December 2014 , Yahoo 's security team knew the state - sponsored actor had stolen copies of backup files that contained users ' personal data .
 the state - sponsored actor: attacker; copies of backup files: compromised data; users ' personal data: compromised data; December 2014: 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: data breach 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, number of victim, compromised data, number of data 
Text: {0} 
Answer:
 the state - sponsored actor: attacker; copies of backup files: compromised data; users ' personal data: compromised data; December 2014: time