some animals move quickly to escape predators
predator is animal. migratory_animal is animal. if_animal is not in_danger_will_run_away. fleeing is action_performed_by_animals. fleeing is not action_performed_by_animals. if_animal is in_danger_will_run_away. escape is running_away. escape is not running_away. migratory_bird is migratory_animal. migratory_animal is not animal.