1091
The city assigned 2 , 000 police officers to the rally , including undercover officers who carried beeper - sized radiation detectors and other counter - terrorism equipment .
 city: place
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:
 city: place