875
APT28 has been linked to last summer ’s attacks attempting to influence the U.S. presidential elections .
 ( phishing: last summer ’s attacks,  APT28: attacker, influence the U.S. presidential elections: purpose) 
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:
 ( phishing: last summer ’s attacks,  APT28: attacker, influence the U.S. presidential elections: purpose) 