230
no one has ever been arrested in connection with that case and the fbi is considering draining a maryland pond relating to evidence for those unsolved attacks .
 fbi: agent; one: person
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: arrest jail 
  Option: person, agent, place 
Text: {0} 
Answer:
 fbi: agent; one: person