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Hunt say that the data breach dates back to August 2016 , but according to the notification letter the Wishbone team sent out , they “ became aware that unknown individuals may have had access to an API without authorization and were able to obtain account information of its users ” only on March 14 , 2017 .
 an API: victim; unknown individuals: 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: data breach 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, number of victim, compromised data, number of data 
Text: {0} 
Answer:
 an API: victim; unknown individuals: attacker