Given the task definition and input, reply with output. 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 _. There are several possible answers, you'll need to choose the proper one. Carefully read the given text, pay special attention to the marked number, think about what (unwritten) information the marked number holds inside, choose the most adequate word(s) from the optional answers. If none of them seems right to you, there's also an option for other. If your answer is "REFERENCE", also write the reference entity, otherwise write the implicit option name. Options to choose from are:
REFERENCE: Some object which is being mentioned in the text before or after the target number. The reference answer has a higher priority than any other. If both Reference and another answer are possible, prioritize the Reference.
YEAR: Describing a calendric year
AGE: Describing someone's age
CURRENCY: Reference to some monetary value e.g dollar, euro etc.
PEOPLE: Describing a single/plural persons
TIME: Describing a time of the day. Usually you can add the word o'clock after those numbers.
OTHER: Some other option, which isn't listed here.

Jesse Jerome:  No , no , dear man , we 've been over this before .
Santini: Jerome , I 'm bored with you bleeding me . I 'm afraid we 're going to have to make a change in our little arrangement .
Jesse Jerome: There are no changes ... Sergeant Mueller ! You see how the very mention of that name renders you completely helpless . You keep forgetting that I know who you are , and where you came from .
Santini: I was _ 21 _ . I was merely a boy .
Jesse Jerome: No one in the SS was " merely a boy , " Mueller . No one in the camps was just a boy . Unless he was being taken into the oven . Do n't misunderstand me . If you push me , I will tell . The newspapers , the immigration service , the Israelis - yes , the Israelis ! Oh , how they 'd love to get their hands on you !
Santini: I think not . I 'm far too valuable to you .
Jesse Jerome: You call that value ?
Santini: Mmm - hmmm .
Jesse Jerome: I 'd do much better turning you in right now , while I still have the chance , before you break in here again , trying to find the old man 's letter , and do n't deny that it was you !
AGE