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 _. 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.
Input: The Doctor:  Welcome !
Billy Shipton: Where am I ?
The Doctor: 1969 . Not as bad as it goes . You 've got the moon landing to look forward to .
Martha Jones: Oh , the moon landing 's brilliant . We went 4 times Back when we still had transport .
The Doctor: Working on it !
Billy Shipton: How did I get here ?
The Doctor: Same way we did . Touch of an angel . Probably the same _ one _ since you ended up in the same year . No , no , no , do n't get up . Time travel without a capsule . Nasty . Catch your breath , do n't go swimming for 30 minutes .
Billy Shipton: I do n't . I ca n't .
The Doctor: Fascinating race , the Weeping Angels . The only psychopaths in the universe to kill you nicely . No mess , no fuss . They just zap you into the past and let you live to death . You die in the past , and in the present , they consume the energy of the life you might have had . They 're creatures of the abstract , they live off potential energy .
Billy Shipton: What in God 's name are you talking about ?
Martha Jones: Trust me , just nod when he stops for breath .
The Doctor: Tracked you down with this . This is my timey , wimey detector . Also , it can boil an egg from 30 paces away . Whether you want it to or not , actually . I 've learned to stay away from hens . It 's not pretty when they blow .

REFERENCE angel