1478
arnett had been covering the war for national geographic , which also fired him as tv reports were given exclusively to nbc and msnbc .
 him: person; which: 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: end position 
  Option: person, entity, place 
Text: {0} 
Answer:
 him: person; which: entity