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In the past , denial of service attacks have been perpetrated by customers with a grudge or by blackmailers , but there is no indication from Lloyds that a ransom demand was received .
 ransom: a ransom demand
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: a ransom demand