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Global organizations in 2016 reported more than 3 billion username and password combinations stolen , led first and foremost by Yahoo 's massive 1.5 billion user breach .
 1.5 billion: number of victim; user: 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: data breach 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, number of victim, compromised data, number of data 
Text: {0} 
Answer:
 1.5 billion: number of victim; user: victim