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Affected were a Russian oil giant , a Danish shipping and energy conglomerate , and Ukrainian government ministries , which were brought to a standstill in a wave of ransom demands .
 ransom: ransom demands
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 demands