745
Iraqi opposition leaders fear the United States is trying to force Ahmed Chalabi , head of the London - based umbrella Iraqi National Congress , on them as leader of a new Iraqi administration .
 Ahmed Chalabi: person; administration: 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: start position 
  Option: person, entity, place 
Text: {0} 
Answer:
 Ahmed Chalabi: person; administration: entity