Detailed 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.
Problem:Sam Seaborn:  So , listen , there 's a fire in Yellowstone Park .
Josh Lyman: Well , put it out .
Sam Seaborn: Technically , I 'm not a professional firefighter , though there was a time I wanted to be .
Josh Lyman: When ?
Sam Seaborn: When I was _ four _ .
Josh Lyman: When I was four , I wanted to be a ballerina .
Sam Seaborn: Yeah ?
Josh Lyman: I do n't like to talk about it .
Sam Seaborn: Ballerina ?
Josh Lyman: I 'd kinda like that not to get around .
Sam Seaborn: Yeah . No chance of that .
President Josiah Bartlet: Josh ?
Josh Lyman: Yes , sir ?
President Josiah Bartlet: A ballerina ?
Josh Lyman: Yeah , I did n't ... I did n't know what it was at the time . I liked the word .
President Josiah Bartlet: We 'll go with that for now .
Solution:
AGE