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In October 2015 the Callisto Group targeted a handful of individuals with phishing emails that attempted to obtain the target ’s webmail credentials .
 target: victim; webmail credentials: compromised data; phishing emails: tool; individuals: victim; the Callisto Group: attacker; October 2015: 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:
 target: victim; webmail credentials: compromised data; phishing emails: tool; individuals: victim; the Callisto Group: attacker; October 2015: time