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Since last week , when the new unlimited plan was announced , various fake Verizon Unlimited Twitter accounts have appeared , and phishers have likewise been sending out bogus offers to upgrade .
 phishers: attacker; fake Verizon Unlimited Twitter accounts: trusted entity; bogus offers to upgrade: attack pattern
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: phishing 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, trusted entity 
Text: {0} 
Answer:
 phishers: attacker; fake Verizon Unlimited Twitter accounts: trusted entity; bogus offers to upgrade: attack pattern