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In Nayana 's first announcement a few days later , it said the hackers demanded 550 bitcoins to free up all the servers -- about $ 1.62 million .
 ransom: demanded
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: demanded