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.

Ex Input:
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.

Ex Output:
What can cola be used to do?

Ex Input:
Article: Howling is a behavior commonly observed among a wolf nark. An animals, wolves work together to hunt and rely on howling was an important means of communication each other. There are different explants of a wolf's howl and it appears that there may be more to discover. One theory is that wolves howl to bend better together. It's almost as if howling together helps the pack stay together. Perhaps something similar to people feeling a sense of involvement with each other when singing a song together . But this theory may be wrong, explains Fred H. Harington, a professor who studies wolf behavior. Indeed, there have been tines when wolves have been seen one moment howling in a exhorts, and the next, quarreling anions each other. It appears that usually the lowest-tanking menthes of the pack may actually be "punished" for Joining in the churs at times. So is howling a way to strcagthen a social boad or just a way to reconfirm status among its members? ----Why do welves howl for sure? What is cleat, however, is that howling is often used among packmates to locate each other. Hunting grounds are distant and it happens that woloves may separate from one another at times. When this happens, howling appcars to be an ercellent means of gathering. Howling, interestingly, is a contagious behaviour. When one wolf starts to howl, very likely others will follow. This is often seen to occat in the morning, as if wolves were doing some sotr of "roll rall"where wolves all howl togeter to howl, very likely others will follow. This is often seen to occar in the morning, as if wolves were doing w some sotr of "roll call"where wolves all howl together to repotr their pteence.
Answer: The sense of belonging to a group.

Ex Output:
.What the por similarity between wolves' how humaes ting in chorus?

Ex Input:
Article: Fifteen hours is a long time to be on a plane ,but you know ,Africa is a long way from North America.Finally ,we're in Namibia, a country in southwest Africa.Namibia is about twice the size of California.However, it is home to just over two million people.And the country's main airport is 45 kilometres east of its capital,Windhoek. Now we are in a wildlife park.We will spend five days finding ways to protect this area's wildlife.At the moment ,my wife and our two kids are enjoying some local dishes.I'm talking with workers in this park.I'm so much looking forward to the following days ! --Thomas Yesterday morning ,I had nothing to do ,so I went to visit the Eiffel Tower,a symbol of Paris.It was my first time there,so I took a lot of photos. Finally.The big moment came! A lot of artists came to watch my show.It was a great success.After the show, I attended a big party.It was great,but i felt so sleepy after it. When I got back to my hotel, it was already 1:15am.I went to bed without washing.I just needed a good rest before my two-hour journey home by plane. --Jessica
Answer: By plane

Ex Output:
How did Thomas arrive in Namibia ?