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.
One 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!
Solution is here: REFERENCE crooler
Explanation: In this example, the number two refers to something that appears in this text. In this example, it refers to the word: crooler.

Now, solve this: Simon:  She 's going to be the hardest to leave and the hardest to hang on to because she 's Ruthie and she 's _ 13 _ and she 's got a boyfriend . And while she understands that I want to leave the rest of the family , she does n't understand how I can leave her but I do n't think she 'll hold it against me , she wo n't have the time to hold it against me . She 's emerging from childhood to adulthood full speed ahead with thoughtful intelligence , a great sense of humor , and a high self esteem . I 'd like to think I had something to do with how great she 's turned out so far and I hope to remain a positive influence in her life , but here 's the thing - I know she feels my pain , we 're that close . And as hard as it is , I really do think it 's best to put a little distance between us right now because I would never forgive myself if I put any rain on Ruthie 's parade , and truthfully I know she will be just fine without me .
Solution:
AGE