Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Seneca:  You know , years ago , your father falsely accused me of adultery . Exiled me , ruined my name . But he was Emperor . Denying t would have cost me my life . I know what it is to be the enemy of an emperor Nero . I 'm too old to be _ one _ again .
Nero: You 'll never be my enemy .

enemy