431
A North Korean hacker group called the Lazarus Group is thought to be behind last week ’s massive ransomware attack and now it is thought a segment of this hacker group may be behind the currency mining attack .
 Lazarus Group: attacker; North Korean hacker group: attacker; last week: time
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:
 Lazarus Group: attacker; North Korean hacker group: attacker; last week: time