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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 .
 ( data breach: obtain,  target: victim, webmail credentials: compromised data, phishing emails: tool, individuals: victim, the Callisto Group: attacker, October 2015: time) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( data breach: obtain,  target: victim, webmail credentials: compromised data, phishing emails: tool, individuals: victim, the Callisto Group: attacker, October 2015: time) 