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: Delenn:  Captain . I wish to speak with you about Mr. Morden . You must release him at once .
Capt. John Sheridan: You , too ? The both of you ? Who is this guy ? What is so important about him ?
Delenn: You will simply have to trust us , Captain . If you do not release him , everyone here is in considerable danger .
Capt. John Sheridan: No . Not until I get some answers once and for all .
Delenn: If this is the only way , then we will give you those answers . But be warned . Once you know his secret , once you know what we have known for the last 2 years , you will not sleep well again . Come , Captain . The greatest nightmare of our time is waiting for you .
Delenn: There are beings in the universe billions of years older than any of our races . Once , long ago , they walked among the stars like giants . Vast and timeless , they taught all the younger races to explore and create great empires . But , to all things , there is an end . Slowly , the First Ones explored beyond the rim never to return . Some simply disappeared .
Capt. John Sheridan: Delenn , I 'm sure this is all very fascinating but what does any of this have to do with Morden ?
Delenn: Not all of the First Ones have gone away . A few stayed behind watching and waiting for the day when they may be needed . When the Shadows come again .
Capt. John Sheridan: Shadows ?
Delenn: We have no other name for them . The Shadows were old when even the Ancients were young . They battled each other over and over across a million years . The last great war against the Shadows was 10000 years ago . It was the last time the Ancients walked openly among us . But the Shadows were only defeated , not destroyed . A thousand years ago , the Shadows returned to their places of power , rebuilt them , and began to stretch forth their hand . Before they could strike they were defeated by an alliance of worlds including the Minbari and the few remaining First Ones who have not yet passed beyond the veil . When it was over , the First Ones left . All but _ one _ .
Capt. John Sheridan: There 's still one of them left ? Where ?
Delenn: That is why Kosh can not leave his encounter suit . He would be recognized .
Capt. John Sheridan: Recognized by whom ?
Kosh: Everyone .
Delenn: For centuries , the Vorlons stood alone . The last remaining guardians . Then , last year , I sent Kosh a message .
Delenn: Did you see Ambassador Kosh ?
Lennier: I did .
Delenn: Did you relay my question precisely ? Word for word .
Lennier: I did .
Delenn: His reaction .
Lennier: Just one word . He said , ' Yes . '
Capt. John Sheridan: If yes was the answer , what was the question ?
Delenn: Have the Shadows returned to Z'ha'dum ?

REFERENCE Ones