1087
In January and February , a group calling itself Stealth Ravens launched DDoS - for - Bitcoin ransom attacks .
 ransom: DDoS - for - Bitcoin ransom attacks
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: DDoS - for - Bitcoin ransom attacks