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.
Q: Zoe:  Doctor , if we 've landed , where are we ?
Dr. Who: That is what I 'm trying to find out , Zoë .
Zoe: A rocket ?
Jamie: Hey , we 're just hanging in space !
Dr. Who: Well , we ca n't be !
Zoe: Well , let 's try and find a star we know .
Dr. Who: There we are . Oh ... What in heaven 's name ... ?
Jamie: Hey , what 's he up to ?
Zoe: He 's trying to climb aboard .
Dr. Who: Just a minute ... Just a minute ... Oh , this control is ... There we are . No , now that 's an ion - jet rocket of the twenty first century , but ... but ... this helmet , if I can ... There we are ! That 's not nearly so sophisticated . It 's certainly not later than nineteen sixty .
Jamie: Those letters on his helmet ?
Zoe: C - C - C - P.
Dr. Who: Of course !
Jamie: What ?
Dr. Who: Just a minute . Yes , I ... I think that explains it !
Zoe: Well , Doctor , what is it ?
Dr. Who: Well , it 's a ... it 's a flying machine , designed by a gentleman by the name of Leonardo Da Vinci in about umm _ fifteen hundred _ .
Jamie: Well , what 's it doing up here ?
Zoe: Doctor , where are we ?
Dr. Who: We 're in a museum !
Jamie, Zoe: A what ?
Dr. Who: A space museum ! Look ! There you are . A balloon ... That 's a transport plane . Now , those initials , they stand for Russia . That 's Gagarin , the first earthman in space . Look . Come on , let 's have a look round , shall we ?
Jamie: Right .
Dr. Who: Wait for me !
A:
YEAR