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.

Let me give you an example: Jess Mastriani: No, I don't want another crooler, thank you very much.
 FBI Agent Nicole Scott: But it's good for you. It's got... honeyglaze. Please die for this crooler, Jess.
 Jess Mastriani: I've had _ two _ already. Who eats three croolers in a night? 
FBI Agent Nicole Scott: Take a look. [Nicole takes a huge bite] Mmmmm, Mmmmm, Mmmmm!
The answer to this example can be: REFERENCE crooler
Here is why: In this example, the number two refers to something that appears in this text. In this example, it refers to the word: crooler.

OK. solve this:
Wizard:  At the age of _ 23 _ , Ryu entered the first World Warrior Tournament to test his skill . He swept through nine powerful combatants before taking on the champoin , Sagat . After a hard fought battle , Sagat was set to take the win .
Boomstick: Until he made the mistake of being a good sport . After beating the shit out of Ryu , Sagat offered him a helping hand up . Instead of taking it , Ryu gave him a surprise punch SO HARD it ripped his chest open and nearly killed the guy . Dick move , Ryu , dick move .
Wizard: This was Ryu 's first taste of the dark power buried within him : the Satsui No Hado , literally the Surge of Murderous Intent .
Boomstick: Still not as good a name as the Diarrhea Joke Foot .
Wizard: The Satsui No Hado gives Ryu incredible power but at the expense of his humanity . He can tap a portion of this power to safely enhance his attacks . However , should his desire to win become so great he would even commit murder , the Satsui no Hado can overwhelm him , and he will lose control , becoming Evil Ryu .
Boomstick: Now we 're talking !
Wizard: Evil Ryu has enormous power to the point of being almost unstoppable . He can even blast a skyscraper to smithereens .
Boomstick: He can teleport short distances , even passing through attacks along the way . More impressively , despite Gouken never teaching him this , Evil Ryu can use the Ansatsuken 's forbidden technique , the Shun Goku Satsu , more commonly known as the Raging Demon .
Answer:
AGE