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The central London university , ranked last week in the world 's top 10 , says that a " widespread ransomware attack " began on Wednesday .
 ransom: ransomware attack
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: ransomware attack