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.

Susan Foreman: We 've left _ 1963 _ .
The Doctor: Oh , yes , undoubtedly . I 'll be able to tell you where presently . Zero ? That 's not right . I 'm afraid this yearometer is not calculating properly . Hm ! Well , anyway , the journey 's finished . What are you doing down there ?
Barbara Wright: What have you done ?
Ian Chesterton: Barbara , you do n't believe all this nonsense .
Susan Foreman: Well , look at the scanner screen .
The Doctor: Yes , look up there . They do n't understand and I suspect they do n't want to . Well , there you are . A new world for you .
Ian Chesterton: Sand and rock ?
The Doctor: Yes . That 's the immediate view outside the ship .
Barbara Wright: But where are we ?
Ian Chesterton: You mean that 's what we 'll see when we go outside ?
Susan Foreman: Yes , you 'll see it for yourself .
Ian Chesterton: I do n't believe it .
The Doctor: You really are a stubborn young man , are n't you ?
Ian Chesterton: All right , show me some proof . Give me some concrete evidence . I 'm sorry , Susan . I do n't want to hurt you , but it 's time you were brought back to reality .
Susan Foreman: But you 're wrong , Mr. Chesterton .
The Doctor: They are saying I 'm a charlatan . What concrete evidence would satisfy you ? Hmm ?
Ian Chesterton: Just open the doors , Doctor Foreman .
The Doctor: Eh ? Doctor who ? What are you talking about ?
YEAR