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Investigators report that attackers would then dump the database 's content and delete it afterward , leaving only the one holding their ransom .
 ( ransom: holding their ransom,  delete it afterward: attack pattern, dump the database 's content: attack pattern, attackers: attacker) 
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:
 ( ransom: holding their ransom,  delete it afterward: attack pattern, dump the database 's content: attack pattern, attackers: attacker) 