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“ Stopping spear phishing attacks is n’t as simple as pushing a button ; the sheer volume of these attacks , coupled with the size of the attacks surface and security resource constraints , makes it impossible to mitigate risk solely via human intervention , no matter how much you try to train your end users , ” said GreatHorn CEO Kevin O’Brien
 ( phishing: spear phishing attacks, None) 
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:
 ( phishing: spear phishing attacks, None) 