1917
Meanwhile , Apple says it ’s actively monitoring to prevent unauthorized access to user accounts and is working with law enforcement to identify the criminals behind the Turkish Crime Family extortion scheme .
 ( ransom: extortion scheme,  the criminals: attacker, Turkish Crime Family: attacker) 
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: extortion scheme,  the criminals: attacker, Turkish Crime Family: attacker) 