Instructions: 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: Captain Jack Harkness:  But all the legends of Gallifrey made it sound so perfect .
The Doctor: Well , perfect to look at , maybe . And it was , it was beautiful . They used to call it the Shining World of the Seven Systems . And on the continent of Wild Endeavour , in the mountains of Solace and Solitude , there stood the Citadel of the Time Lords . The oldest and most mighty race in the universe . Looking down on the galaxies below , sworn never to interfere , only to watch . Children of Gallifrey were taken from their families at the age of _ eight _ to enter the Academy . Some say that 's where it all began , when he was a child . That 's when the Master saw eternity . As a novice , he was taken for initiation . He stood in front of the Untempered Schism . It 's a gap in the fabric of reality through which could be seen the whole of the vortex . We stand there , eight years old , staring at the raw power of time and space , just a child . Some would be inspired . Some would run away . And some would go mad .
Martha Jones: What about you ?
The Doctor: Oh , the ones that ran away , I never stopped .
Output:
REFERENCE age