2316
Fortunately the number of staff from DCHFT who were involved in this data security breach was small , with fewer than 55 current or former employees affected .
 ( data breach: data security breach,  55: number of victim, DCHFT: victim, staff: victim, current or former employees: 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: data security breach,  55: number of victim, DCHFT: victim, staff: victim, current or former employees: victim) 