1410
The Managing Director of a company held to ransom by hackers has warned other bosses to protect themselves against cyber crooks − or run the risk of web sharks crippling their businesses .
 ( ransom: held to ransom,  hackers: attacker, a company: victim, The Managing Director: victim, cyber crooks: 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: held to ransom,  hackers: attacker, a company: victim, The Managing Director: victim, cyber crooks: attacker) 