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: Consider Input: Edward Snowden:  So , this is data collection for the month of March worldwide , emails and Skype calls . So France , 70 million . Germany , 500 million . Brazil , two billion . Inside the U.S. , 3.1 billion emails and calls . That 's not including any of the telecom company data .
NSA Dep. Director Lowell: Okay , so what 's the collection in Russia ?
Edward Snowden: Russia is _ 1.5 _ billion .
NSA Dep. Director Lowell: Wait , so we 're collecting twice as much in the U.S. as we are in Russia ?

Output: REFERENCE calls


Input: Consider Input: Richard Castle:  So , I was thinking ... when we work a case together , this desk of yours is sort of ... kind of our space . And these elephants on parade have creeped me out since day one , so what do you say we just get rid of these ? Oh , I 'm sorry , do you have a problem with that , if I try to get rid of something that obviously has deep meaning to you ?
Kate Beckett: If you do n't like the elephants , I do n't like the elephants .
Richard Castle: Fine . I actually like those elephants . They obviously have family values , and this _ one _ 's good with money .

Output: REFERENCE elephants


Input: Consider Input: Juliane Thomas:  Your friend is a horrible person .
Dr. Jean Berner: Without teeth , he would be charming .
Juliane Thomas: Well , we only pulled _ one _ out so far .


Output: REFERENCE teeth