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.

Article: Coca-Cola is probably the most famous brand in the world, and in some areasyou can even access it easier than clean drinkable water. Although the company is trying to present itself as a health-conscious company, you can't really say that drinking cola is healthy for you. Still, we all drink cola, some more and some less, and we tell ourselves that it's all okay as long as we don't overdo it. However, Coca-Cola has other functions besides drinking. Cola removes the tarnish from old pennies. Got some old rusty pennies? Not to worry! Put them inside a glass of cola and let them rest for a while. When you get them out, you'll have shiny pennies that will look as if they were coined a couple of days ago. If you couldn't clean those pennies with industrial acids, just buy a can of cola and let it do its magic! You can remove gum from your hair with cola. If you've got gum stuck in your hair and don't know a better way to get it out, don't worry, you won't have to cut it. Just pour some cola into a bowl and dip the part of your hair with gum on it inside. Leave it for a couple of minutes and then simply wipe off the gum. You can make an exploding fountain. You probably know about this one. You can make an exploding fountain by putting a mint inside a two-liter bottle. Then move away from the bottle and get ready for a Coca-Cola explosion. This is a fun thing to do, but it is also a warning -- don't eat a mint and drink cola at the same time, because a similar thing could happen to your stomach.
Answer: Take the place of acids.
What can cola be used to do?

Article: As is known, it is a respectful job to be a teacher serving students heart and soul. And most people also compare a teacher to a gardener who takes great care of various plants. Ever since my high school days, my heart has been set on becoming a teacher. I am now studying at a teacher's college, and I am making great efforts to study, because there are so many things to learn about education. But I thoroughly enjoy my studies, and every day I am amazed at the great influence education has on the human soul. I think it is only natural that I have always _ to become a teacher because my father and his father were also teachers. My father is now retired, following a brilliant career, and it has always been his dream to have me, his only son, follow in his footsteps. Although it sounds like my father's dream that I will become a teacher, it is also my dream and I am quite willing to realize the dream. I still have one more year to go at university, and after I graduate, I will go to the western part of China to become a teacher at a village school. I understand a teacher's job will not make me a millionaire, but it is not the prospect of making a lot of money that has propelled my ambition to become a teacher. Rather, it is my sincere desire to assume a responsible role in society, and make as many people well--educated as possible through my hard endeavors. Education plays an essential and important role in our society. If everyone can receive a good education, it will not only do good to our country but also benefit individuals' lives. Ten years from now, therefore, I hope to be established as an excellent teacher with hundreds of thousands of students who have benefited from me and carry on the family tradition with efficiency and honour.
Answer: A researcher.
What's the author now?

Article: It is said that in the United States much has been told about that anyone can become rich and successful if he works hard and has some good luck. Yes, when one becomes rich he wants people to know it. And even though he does not become very rich, he wants people to think that he is. That's what "Keeping up with the Joneses " is about The expression was first used in 1913 by a young American called Arthur Momand looked around him and noticed that many people did things to keep up with their neighbours. He called it "Keeping up with the Joneses", because Jones is a very common name in the United States. "Keeping up with the Joneses" came to mean keeping up with the people around you. Momand's series appeared in different newspapers across the country for over 28 years. People never seem to get tired of keeping up with the Joneses. That is one reason why they read "right" books, go to "right" universities and eat in "right" restaurants. Every city has an area where people want to live because others will think better of them if they do. And there are Joneses in every city of the world. But one must get tired of trying to keep up with the Joneses, because no matter what one does, Mr Jones always seems to be ahead.
Answer: Because they want others to know or think they are rich.
Why, according to the passage, do many people try to keep up with the Joneses?