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Companies that have yet to be targeted by these or other hackers would do well to improve their security posture , but also to prepare for data breaches by tightening access to their backup environment , and knowing exactly who will be called in to help in case of a breach .
 ( data breach: data breaches,  hackers: attacker, Companies: victim) 
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: data breaches,  hackers: attacker, Companies: victim) 