2313
Computer hackers have stolen private files from the company Landauer , which is employed by the NHS to monitor radiation levels among staff .
 ( data breach: have stolen,  private files: compromised data, the company Landauer: victim, Computer hackers: attacker, staff: victim) 
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:
 ( data breach: have stolen,  private files: compromised data, the company Landauer: victim, Computer hackers: attacker, staff: victim) 