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Ironically , that was the same day that staff at Hāwera High School switched on their computers to discover the message demanding US$ 5000 ( NZ$ 7352 ) in bitcoin for the return of encrypted data on a server containing students ' work and teaching resources .
 Hāwera High School: victim; staff: victim; US$ 5000: price; NZ$ 7352: price; in bitcoin: payment method; a server: victim
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 Hāwera High School: victim; staff: victim; US$ 5000: price; NZ$ 7352: price; in bitcoin: payment method; a server: victim