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.

Q: 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 ?

A: REFERENCE calls
****
Q: Michael Garibaldi:  Why is that we always break up our history by the the wars , not the years of peace ? The Hundred Years War , War of _ 1812 _ , the first three World Wars , the Dilgar War , the War of the Shining Star , the Minbari War , the Shadow War . Why the war and not the peace ? Because it 's exciting , and because on some level people like to see something big fall apart and explode from the inside out . And right now , John , we 're that something .

A: YEAR
****
Q: Sgt. Joe Friday:  This is the city . From one night to the next it 's never the same . They make it that way . Counting the suburbs , there 's _ four _ million of 'em . Most of the people have something to add . A few of 'em are out to take it away . In my job , they 're the ones that keep you on the move . I 'm a cop .

A:
REFERENCE people
****