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Once the ransom is paid , the hackers send their victim an electronic key to unlock their encrypted files , but if the payment is not made within a certain time frame the hacked files are lost forever .
 ransom: the ransom is paid
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: the ransom is paid