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The Cockerell Hill Police Department in south Dallas decided after speaking to the FBI not to pay the near $ 4000 ransom after discovering the malware in mid-December .
 ( ransom: not to pay,  south Dallas: place, near $ 4000: price, The Cockerell Hill Police Department: victim, mid-December: time, the malware: tool) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: not to pay,  south Dallas: place, near $ 4000: price, The Cockerell Hill Police Department: victim, mid-December: time, the malware: tool) 