1090
Organisers claimed that some 250 , 000 people attended the rally , creating a human column some three kilometres ( 1 . 8 miles ) long .
 people: 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: demonstrate 
  Option: entity, place 
Text: {0} 
Answer:
 people: entity