1653
cnn has learned osama bin laden sent a private letter to his followers in february , ordering them to attack the u . s . and its allies .
 osama bin laden: entity; followers: entity
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: phone write 
  Option: entity, place 
Text: {0} 
Answer:
 osama bin laden: entity; followers: entity