1708
reporter : the twin missions to hunt for signs of life are set for a journey of a quarter billion miles , carrying identical red planet rovers .
 rovers: artifact
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: transport 
  Option: victim, artifact, destination, place, origin, vehicle, agent 
Text: {0} 
Answer:
 rovers: artifact