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The same thing happened in 2015 , in a series of attacks called RansomWeb , where attackers used unpatched phpBB forums to hijack databases and hold websites up for ransom .
 ransom: ransom
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 ransom: ransom