Input (grade 13): Events By place Roman Empire The Year of the Four Emperors: After Nero's death, Galba, Otho, Vitellius and Vespasian succeed each other as emperor during the year.
Output (grade 10): Events The Year of the four emperors: After Nero's death, Galba, Otho and Vitellius all serve as emperor for a short time each before Vespasian takes over.