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However , after Yahoo disclosed the breach , a few months later , the company learned of an even bigger hack that involved 1 billion Yahoo user accounts and further rocked the company 's reputation .
 Yahoo user accounts: compromised data; 1 billion: number of data; the company: victim; a few months later: 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:
 Yahoo user accounts: compromised data; 1 billion: number of data; the company: victim; a few months later: time