486
A study by researchers at Google , Chainalysis , University of California San Diego and NYU Tandon School of Engineering estimated that from 2016 to mid 2017 , victims paid $ 25 million in ransom to get files back .
 ransom: paid
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: paid