In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: This is a list of the origins of some slang words or phrases that we all use regularly.These words are common in almost all English speaking nations. Cool Who hasn't used this word at least once in their life when speaking highly of something? This meaning of the word is ly new in English,but not as new as you might think.The earliest record found so far is from 1884 in the phrase"Dat's cool!" Kick the Bucket This means"to die".Many people consider the term to have come from a guilty man standing on an upturned bucket which was then kicked out from under his feet leaving him to hang,but there is no written evidence that this is the case.In fact,it is more likely from a different type of bucket entirely.In butchery ,when a pig was killed it would be hung from a pole.It is mostly likely that in his death throes ,the pig's feet would bang against the rail to which they were tied.Therefore,kicking the bucket was a term referring to the last actions of the pig before he finally died. Bob's Your Uncle Bob's your uncle generally means that something is simple or easy or a"job done".It is most likely that this phrase came about as a result of nepotism .In the late 1800s, Lord Salisbury(first name Robert)was prime-minister of Great Britain.After his third term he was _ by his nephew Arthur.Arthur had been made Chief Secretary of Ireland in 1886. Suspicions arose that Robert was favoring his nephew Arthur.The term"Bob's your uncle"could be used at the time as a reference to this charge of nepotism.
Answer: The origins of some most.commonly used slang words or phrases.

A: What does the passage mainly talk about?
****
Q: Article: There is a problem each of us faces in following advice on emotional healing: apologizing is difficult. We are trapped in what we think of ourselves by holding onto our pride. We can be selfish and not willing to admit our most obvious mistakes. Pride eats away at us as we argue or ignore the mistake. It's happened to me. I have had too much pride and selfishness to apologize to a loved one I hurt. When I did want to apologize, I couldn't bring myself to face the other person. This is the pride I'm talking about. Maybe apologies come difficult for men because they're expected to be dominant. It's like the joke that a man never asks for directions when lost. Ladies are more emotionally open than guys and are willing to express it. Still, both genders wonder how to correctly apologize. In shifting the focus on apologizing away from you, what does not apologizing do to other people? They feel hurt that you are not willing to communicate your mistake. They lose trust in you as you hide behind your mistake avoiding reality. They become angry with you, wondering why you do not tell them the truth. They may begin to counter your lack of apologies by not apologizing themselves and from this the relationship goes downhill as the two of you get caught in a power struggle. You need to communicate your mistakes. A mistake you made is like a scratch and by not apologizing you are making the scratch a deeper wound and rubbing salt into it. You need to stop hurting the other person and yourself by learning to apologize. There is real power in apologizing and emotional healing.
Answer: They aren't good at expressing themselves.

A: Why are men more unwilling to make apologies?
****
Q: Article: Water and its importance to human life are the center of the world's attention. March 22 is World Water Day, which has the theme "Water and culture "this year. There are more than one billion people in the world who live without safe drinking water. The United Nations hopes to cut this number in half by 2015. Solving such a big problem seems like an unreal challenge. But everyone, even teenagers, can do something to help. A teenage girl in the U.S. has set an example to others of her age around the world. Rene Haggerty, 13, was awarded the 2004 Gloria Barron Prize for her work of collecting deserted batteries which pollute water. In 2003, Haggerty went on a field trip to the Great Lakes Science Centre in Ohio. There, she saw an exhibit about how chemicals in old batteries harm the water of Lake Erie. Haggerty learnt that recycling the batteries was an easy solution. "I think everybody can do it, because everyone uses batteries, and it can make a big difference." With these words, she began to increase awareness in her area. She talked to her county government and school board. She got permission to start a recycling programmed in schools as well as the public libraries, hospitals, and churches. With the help from her family, friends and local waste-management officials, she gathered containers, arranged transportation, and made an educational video. Over the past two years, she collected four tons of batteries and drew the attention of officials, who were in charge of a battery recycling programmed but had made little progress. When asked if she feels like a hero, Haggerty is quite modest . "Not really. Well, maybe for the fish I saved!" Every year the Gloria Barron Prize honors young Americans aged 8 to 18 who have shown leadership and courage in serving the public and the planet. Each year ten winners receive $2,000 each, to help with their education costs or their public service work.
Answer: About 5 million.

A:
According to the passage, how many people probably can't drink safe drinking water in 2015?
****